Windows Hotpatch Updates

Hotpatch is a separate security-servicing program for eligible, enrolled devices. Hotpatch releases do not require an OS restart; baselines do. Other updates, prerequisites and device configuration can still require a restart. This history does not assess a device's eligibility or compliance.

Windows 11 Enterprise 24H2, 25H2 and 26H2 sources are tracked independently. Windows Server 2022 requires a supported Datacenter Azure Edition image; Server 2025 supports eligible Azure images and Azure Arc-connected Standard/Datacenter systems. See the official Windows client prerequisites and Windows Server prerequisites.

Supplemental component fixes are listed separately. Unknown dates, builds and restart requirements are not inferred. A calendar baseline is context from Microsoft's published schedule, not a substitute for the KB's installation prerequisites.

Published releases and baseline notes

170 entries across 5 official sources. Last successful refresh: . Automatic collection every 6 hours.

Reset

170 matching entries. Shared KBs remain distinct by product, version and build.

Product / versionKB / detailsRelease date BuildKind / OS restartCalendar baseline
Windows 11 Enterprise 24H2 KB5129241
Details

September 14, 2026—Hotpatch KB5129241 (OS Builds 26200.9448 and 26100.9448) Out-of-band

Microsoft release-history source

 2026-09-14 26100.9448 Hotpatch · Out-of-band
No OS restart
 KB5124008
Windows 11 Enterprise 25H2 KB5129241
Details

September 14, 2026—Hotpatch KB5129241 (OS Builds 26200.9448 and 26100.9448) Out-of-band

Microsoft release-history source

 2026-09-14 26200.9448 Hotpatch · Out-of-band
No OS restart
 KB5124008
Windows 11 Enterprise 24H2 KB5124008
Details

September 8, 2026—Baseline

Microsoft release-history source

 2026-09-08 26100.9445 Baseline
Restart required
 Not documented
Windows 11 Enterprise 25H2 KB5124008
Details

September 8, 2026—Baseline

Microsoft release-history source

 2026-09-08 26200.9445 Baseline
Restart required
 Not documented
Windows Server 2025 KB5122871
Details

September 8, 2026—Baseline

Microsoft release-history source

 2026-09-08 26100.33438 Baseline
Restart required
 Not documented
Windows Server Datacenter Azure Edition 2022 Baseline note
Details

September 8, 2026—Baseline

Microsoft release-history source

Some article details are unavailable. Open Microsoft's KB for the authoritative information.

 2026-09-08 Not documented Baseline
Restart required
 Not documented
Windows 11 Enterprise 24H2 KB5120994
Details

August 11, 2026—Hotpatch KB5120994 (OS Builds 26200.9106 and 26100.9106)

Microsoft release-history source

 2026-08-11 26100.9106 Hotpatch
No OS restart
 KB5101650
Windows 11 Enterprise 25H2 KB5120994
Details

August 11, 2026—Hotpatch KB5120994 (OS Builds 26200.9106 and 26100.9106)

Microsoft release-history source

 2026-08-11 26200.9106 Hotpatch
No OS restart
 KB5101650
Windows Server 2025 KB5120228
Details

August 11, 2026—Hotpatch KB5120228 (OS Build 26100.33222)

Microsoft release-history source

 2026-08-11 26100.33222 Hotpatch
No OS restart
 KB5099536
Windows Server Datacenter Azure Edition 2022 KB5120229
Details

August 11, 2026—Hotpatch KB5120229 (OS Build 20348.5440)

Microsoft release-history source

 2026-08-11 20348.5440 Hotpatch
No OS restart
 KB5099540
Windows 11 Enterprise 24H2 KB5121768
Details

July 18, 2026—Hotpatch KB5121768 (OS Builds 26200.8893 and 26100.8893) Out-of-band

Microsoft release-history source

 2026-07-18 26100.8893 Hotpatch · Out-of-band
No OS restart
 KB5101650
Windows 11 Enterprise 25H2 KB5121768
Details

July 18, 2026—Hotpatch KB5121768 (OS Builds 26200.8893 and 26100.8893) Out-of-band

Microsoft release-history source

 2026-07-18 26200.8893 Hotpatch · Out-of-band
No OS restart
 KB5101650
Windows 11 Enterprise 24H2 KB5101650
Details

July 14, 2026—Baseline

Microsoft release-history source

 2026-07-14 26100.8875 Baseline
Restart required
 Not documented
Windows 11 Enterprise 25H2 KB5101650
Details

July 14, 2026—Baseline

Microsoft release-history source

 2026-07-14 26200.8875 Baseline
Restart required
 Not documented
Windows Server 2025 KB5099536
Details

July 14, 2026—Baseline

Microsoft release-history source

 2026-07-14 26100.33158 Baseline
Restart required
 Not documented
Windows Server Datacenter Azure Edition 2022 Baseline note
Details

July 14, 2026—Baseline

Microsoft release-history source

Some article details are unavailable. Open Microsoft's KB for the authoritative information.

 2026-07-14 Not documented Baseline
Restart required
 Not documented
Windows 11 Enterprise 24H2 KB5094126
Details

June 9, 2026—Baseline

Microsoft release-history source

 2026-06-09 26100.8655 Baseline
Restart required
 Not documented
Windows 11 Enterprise 25H2 KB5094126
Details

June 9, 2026—Baseline

Microsoft release-history source

 2026-06-09 26200.8655 Baseline
Restart required
 Not documented
Windows Server 2025 KB5094125
Details

June 9, 2026—Baseline

Microsoft release-history source

 2026-06-09 26100.32995 Baseline
Restart required
 Not documented
Windows Server Datacenter Azure Edition 2022 Baseline note
Details

June 9, 2026—Baseline

Microsoft release-history source

Some article details are unavailable. Open Microsoft's KB for the authoritative information.

 2026-06-09 Not documented Baseline
Restart required
 Not documented
Windows 11 Enterprise 24H2 KB5089466
Details

May 12, 2026—Hotpatch KB5089466 (OS Builds 26200.8390 and 26100.8390)

Microsoft release-history source

 2026-05-12 26100.8390 Hotpatch
No OS restart
 KB5083769
Windows 11 Enterprise 25H2 KB5089466
Details

May 12, 2026—Hotpatch KB5089466 (OS Builds 26200.8390 and 26100.8390)

Microsoft release-history source

 2026-05-12 26200.8390 Hotpatch
No OS restart
 KB5083769
Windows Server 2025 KB5087423
Details

May 12, 2026—Hotpatch KB5087423 (OS Build 26100.32772)

Microsoft release-history source

 2026-05-12 26100.32772 Hotpatch
No OS restart
 KB5082063
Windows Server Datacenter Azure Edition 2022 KB5087424
Details

May 12, 2026—Hotpatch KB5087424 (OS Build 20348.5074)

Microsoft release-history source

 2026-05-12 20348.5074 Hotpatch
No OS restart
 KB5082142
Windows Server 2025 KB5091470
Details

April 19, 2026—Hotpatch KB5091470 (OS Build 26100.32704) Out-of-band

Microsoft release-history source

 2026-04-19 26100.32704 Hotpatch · Out-of-band
No OS restart
 KB5082063
Windows Server Datacenter Azure Edition 2022 KB5091576
Details

April 19, 2026—Hotpatch KB5091576 (OS Build 20348.5029) Out-of-band

Microsoft release-history source

 2026-04-19 20348.5029 Hotpatch · Out-of-band
No OS restart
 KB5082142
Windows 11 Enterprise 24H2 KB5083769
Details

April 14, 2026—Baseline

Microsoft release-history source

 2026-04-14 26100.8246 Baseline
Restart required
 Not documented
Windows 11 Enterprise 25H2 KB5083769
Details

April 14, 2026—Baseline

Microsoft release-history source

 2026-04-14 26200.8246 Baseline
Restart required
 Not documented
Windows Server 2025 KB5082063
Details

April 14, 2026—Baseline

Microsoft release-history source

 2026-04-14 26100.32690 Baseline
Restart required
 Not documented
Windows Server Datacenter Azure Edition 2022 Baseline note
Details

April 14, 2026—Baseline

Microsoft release-history source

Some article details are unavailable. Open Microsoft's KB for the authoritative information.

 2026-04-14 Not documented Baseline
Restart required
 Not documented
Windows 11 Enterprise 24H2 KB5085518
Details

March 23, 2026—Hotpatch KB5085518 (OS Builds 26200.7985 and 26100.7985) Out-of-band

Microsoft release-history source

 2026-03-23 26100.7985 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows 11 Enterprise 25H2 KB5085518
Details

March 23, 2026—Hotpatch KB5085518 (OS Builds 26200.7985 and 26100.7985) Out-of-band

Microsoft release-history source

 2026-03-23 26200.7985 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows 11 Enterprise 24H2 KB5084897
Details

March 16, 2026—Hotpatch KB5084897 (OS Builds 26200.7984 and 26100.7984) Out-of-band

Microsoft release-history source

 2026-03-16 26100.7984 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows 11 Enterprise 25H2 KB5084897
Details

March 16, 2026—Hotpatch KB5084897 (OS Builds 26200.7984 and 26100.7984) Out-of-band

Microsoft release-history source

 2026-03-16 26200.7984 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows 11 Enterprise 24H2 KB5084597
Details

March 13, 2026—Hotpatch KB5084597 (OS Builds 26200.7982 and 26100.7982) Out-of-band

Microsoft release-history source

 2026-03-13 26100.7982 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows 11 Enterprise 25H2 KB5084597
Details

March 13, 2026—Hotpatch KB5084597 (OS Builds 26200.7982 and 26100.7982) Out-of-band

Microsoft release-history source

 2026-03-13 26200.7982 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows 11 Enterprise 24H2 KB5079420
Details

March 10, 2026—Hotpatch KB5079420 (OS Builds 26200.7979 and 26100.7979)

Microsoft release-history source

 2026-03-10 26100.7979 Hotpatch
No OS restart
 KB5074109
Windows 11 Enterprise 25H2 KB5079420
Details

March 10, 2026—Hotpatch KB5079420 (OS Builds 26200.7979 and 26100.7979)

Microsoft release-history source

 2026-03-10 26200.7979 Hotpatch
No OS restart
 KB5074109
Windows Server 2025 KB5078736
Details

March 10, 2026—Hotpatch KB5078736 (OS Build 26100.32463)

Microsoft release-history source

 2026-03-10 26100.32463 Hotpatch
No OS restart
 KB5073379
Windows Server Datacenter Azure Edition 2022 KB5078737
Details

March 10, 2026—Hotpatch KB5078737 (OS Build 20348.4830)

Microsoft release-history source

 2026-03-10 20348.4830 Hotpatch
No OS restart
 KB5073457
Windows 11 Enterprise 24H2 KB5077212
Details

February 10, 2026—Hotpatch KB5077212 (OS Builds 26200.7781 and 26100.7781)

Microsoft release-history source

 2026-02-10 26100.7781 Hotpatch
No OS restart
 KB5074109
Windows 11 Enterprise 25H2 KB5077212
Details

February 10, 2026—Hotpatch KB5077212 (OS Builds 26200.7781 and 26100.7781)

Microsoft release-history source

 2026-02-10 26200.7781 Hotpatch
No OS restart
 KB5074109
Windows Server 2025 KB5075942
Details

February 10, 2026—Hotpatch KB5075942 (OS Build 26100.32313)

Microsoft release-history source

 2026-02-10 26100.32313 Hotpatch
No OS restart
 KB5073379
Windows Server Datacenter Azure Edition 2022 KB5075943
Details

February 10, 2026—Hotpatch KB5075943 (OS Build 20348.4711)

Microsoft release-history source

 2026-02-10 20348.4711 Hotpatch
No OS restart
 KB5073457
Windows 11 Enterprise 24H2 KB5078167
Details

January 24, 2026—Hotpatch KB5078167 (OS Builds 26200.7634 and 26100.7634) Out-of-band

Microsoft release-history source

 2026-01-24 26100.7634 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows 11 Enterprise 25H2 KB5078167
Details

January 24, 2026—Hotpatch KB5078167 (OS Builds 26200.7634 and 26100.7634) Out-of-band

Microsoft release-history source

 2026-01-24 26200.7634 Hotpatch · Out-of-band
No OS restart
 KB5074109
Windows Server Datacenter Azure Edition 2022 KB5078238
Details

January 24, 2026—Hotpatch KB5078238 (OS Build 20348.4655) Out-of-band

Microsoft release-history source

 2026-01-24 20348.4655 Hotpatch · Out-of-band
No OS restart
 KB5073457
Windows 11 Enterprise 24H2 KB5074109
Details

January 13, 2026—Baseline

Microsoft release-history source

 2026-01-13 26100.7623 Baseline
Restart required
 Not documented
Windows 11 Enterprise 25H2 KB5074109
Details

January 13, 2026—Baseline

Microsoft release-history source

 2026-01-13 26200.7623 Baseline
Restart required
 Not documented
Windows Server 2025 KB5073379
Details

January 13, 2026—Baseline

Microsoft release-history source

 2026-01-13 26100.32230 Baseline
Restart required
 Not documented
Microsoft calendars, including months without a documented KB

These are the source's published calendar labels, not proof that an update has been released. Unlinked months are not counted as published patches. Older transposed calendars without KB references are not converted into release records.

Product / versionPeriodKindKBSource
Windows 11 Enterprise 24H22026.12Hotpatch No KB documentedMicrosoft calendar
Windows 11 Enterprise 25H22026.12Hotpatch No KB documentedMicrosoft calendar
Windows Server 20252026.12Hotpatch No KB documentedMicrosoft calendar
Windows Server Datacenter Azure Edition 20222026.12Hotpatch No KB documentedMicrosoft calendar
Windows 11 Enterprise 24H22026.11Hotpatch No KB documentedMicrosoft calendar
Windows 11 Enterprise 25H22026.11Hotpatch No KB documentedMicrosoft calendar
Windows Server 20252026.11Hotpatch No KB documentedMicrosoft calendar
Windows Server Datacenter Azure Edition 20222026.11Hotpatch No KB documentedMicrosoft calendar
Windows 11 Enterprise 24H22026.10Baseline No KB documentedMicrosoft calendar
Windows 11 Enterprise 25H22026.10Baseline No KB documentedMicrosoft calendar
Windows 11 Enterprise 26H22026.10Baseline No KB documentedMicrosoft calendar
Windows Server 20252026.10Baseline No KB documentedMicrosoft calendar
Windows Server Datacenter Azure Edition 20222026.10Baseline No KB documentedMicrosoft calendar
Windows 11 Enterprise 24H22026.09Baseline KB5124008Microsoft calendar
Windows 11 Enterprise 25H22026.09Baseline KB5124008Microsoft calendar
Windows Server 20252026.09Baseline No KB documentedMicrosoft calendar
Windows Server Datacenter Azure Edition 20222026.09Baseline No KB documentedMicrosoft calendar
Windows 11 Enterprise 24H22026.08Hotpatch KB5120994Microsoft calendar
Windows 11 Enterprise 25H22026.08Hotpatch KB5120994Microsoft calendar
Windows Server 20252026.08Hotpatch KB5120228Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.08Hotpatch KB5120229Microsoft calendar
Windows 11 Enterprise 24H22026.07Baseline KB5101650Microsoft calendar
Windows 11 Enterprise 25H22026.07Baseline KB5101650Microsoft calendar
Windows Server 20252026.07Baseline KB5099536Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.07Baseline KB5099540Microsoft calendar
Windows 11 Enterprise 24H22026.06Baseline KB5094126Microsoft calendar
Windows 11 Enterprise 25H22026.06Baseline KB5094126Microsoft calendar
Windows Server 20252026.06Baseline KB5094125Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.06Baseline KB5094128Microsoft calendar
Windows 11 Enterprise 24H22026.05Hotpatch KB5089466Microsoft calendar
Windows 11 Enterprise 25H22026.05Hotpatch KB5089466Microsoft calendar
Windows Server 20252026.05Hotpatch KB5087423Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.05Hotpatch KB5087424Microsoft calendar
Windows 11 Enterprise 24H22026.04Baseline KB5083769Microsoft calendar
Windows 11 Enterprise 25H22026.04Baseline KB5083769Microsoft calendar
Windows Server 20252026.04Baseline KB5082063Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.04Baseline KB5082142Microsoft calendar
Windows 11 Enterprise 24H22026.03Hotpatch KB5079420Microsoft calendar
Windows 11 Enterprise 25H22026.03Hotpatch KB5079420Microsoft calendar
Windows Server 20252026.03Hotpatch KB5078736Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.03Hotpatch KB5078737Microsoft calendar
Windows 11 Enterprise 24H22026.02Hotpatch KB5077212Microsoft calendar
Windows 11 Enterprise 25H22026.02Hotpatch KB5077212Microsoft calendar
Windows Server 20252026.02Hotpatch KB5075942Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.02Hotpatch KB5075943Microsoft calendar
Windows 11 Enterprise 24H22026.01Baseline KB5074109Microsoft calendar
Windows 11 Enterprise 25H22026.01Baseline KB5074109Microsoft calendar
Windows Server 20252026.01Baseline KB5073379Microsoft calendar
Windows Server Datacenter Azure Edition 20222026.01Baseline KB5073457Microsoft calendar
Windows 11 Enterprise 24H22025.12Hotpatch KB5072014Microsoft calendar
Windows 11 Enterprise 25H22025.12Hotpatch KB5072014Microsoft calendar
Windows Server 20252025.12Hotpatch KB5072014Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.12Hotpatch KB5071413Microsoft calendar
Windows 11 Enterprise 24H22025.11Hotpatch KB5068966Microsoft calendar
Windows 11 Enterprise 25H22025.11Hotpatch KB5068966Microsoft calendar
Windows Server 20252025.11Hotpatch KB5068966Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.11Hotpatch KB5068840Microsoft calendar
Windows 11 Enterprise 24H22025.10Baseline KB5066835Microsoft calendar
Windows 11 Enterprise 25H22025.10Baseline KB5066835Microsoft calendar
Windows Server 20252025.10Baseline KB5066835Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.10Baseline KB5066782Microsoft calendar
Windows 11 Enterprise 24H22025.09Hotpatch KB5065474Microsoft calendar
Windows Server 20252025.09Hotpatch KB5065474Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.09Hotpatch KB5065306Microsoft calendar
Windows 11 Enterprise 24H22025.08Hotpatch KB5064010Microsoft calendar
Windows Server 20252025.08Hotpatch KB5064010Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.08Hotpatch KB5063812Microsoft calendar
Windows 11 Enterprise 24H22025.07Baseline KB5062553Microsoft calendar
Windows Server 20252025.07Baseline KB5062553Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.07Baseline KB5062572Microsoft calendar
Windows 11 Enterprise 24H22025.06Hotpatch KB5060841Microsoft calendar
Windows Server 20252025.06Hotpatch KB5060841Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.06Hotpatch KB5060525Microsoft calendar
Windows 11 Enterprise 24H22025.05Hotpatch KB5058497Microsoft calendar
Windows Server 20252025.05Hotpatch KB5058497Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.05Hotpatch KB5058500Microsoft calendar
Windows 11 Enterprise 24H22025.04Baseline KB5055523Microsoft calendar
Windows Server 20252025.04Baseline KB5055523Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.04Baseline KB5055526Microsoft calendar
Windows 11 Enterprise 24H22025.03Hotpatch KB5053636Microsoft calendar
Windows Server 20252025.03Hotpatch KB5053636Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.03Hotpatch KB5053638Microsoft calendar
Windows 11 Enterprise 24H22025.02Hotpatch KB5052105Microsoft calendar
Windows Server 20252025.02Hotpatch KB5052105Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.02Hotpatch KB5052106Microsoft calendar
Windows 11 Enterprise 24H22025.01Baseline KB5050009Microsoft calendar
Windows Server 20252025.01Baseline KB5050009Microsoft calendar
Windows Server Datacenter Azure Edition 20222025.01Baseline KB5049983Microsoft calendar
Windows 11 Enterprise 24H22024.12Hotpatch KB5048794Microsoft calendar
Windows Server 20252024.12Hotpatch KB5048794Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.12Hotpatch KB5048800Microsoft calendar
Windows 11 Enterprise 24H22024.11Hotpatch KB5046696Microsoft calendar
Windows Server 20252024.11Hotpatch KB5046696Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.11Hotpatch KB5046698Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.10Baseline KB5044281Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.09Hotpatch KB5042880Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.08Baseline KB5041160Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.07Baseline KB5040437Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.06Hotpatch KB5039330Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.05Hotpatch KB5037848Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.04Baseline KB50369809Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.03Hotpatch KB5035959Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.02Hotpatch KB5034860Microsoft calendar
Windows Server Datacenter Azure Edition 20222024.01Baseline KB5034129Microsoft calendar

Source coverage

Windows 11 Enterprise 24H2: 38 entries; 0 different-build rows and 0 unsafe links excluded.

Windows 11 Enterprise 25H2: 25 entries; 0 different-build rows and 0 unsafe links excluded.

Windows 11 Enterprise 26H2: 0 entries; 19 different-build rows and 0 unsafe links excluded. This source currently provides no verifiable release for this build family. Rows for other versions are not relabeled.

Windows Server 2025: 31 entries; 0 different-build rows and 0 unsafe links excluded.

Windows Server Datacenter Azure Edition 2022: 76 entries; 0 different-build rows and 0 unsafe links excluded.

Programmatic access: GET /api/WindowsVersions/hotpatch. See API access and authentication.