KB5101650 is Microsoft’s July 14, 2026 cumulative security update for Windows 11 versions 24H2 and 25H2. It moves version 24H2 to OS build 26100.8875 and version 25H2 to OS build 26200.8875.
What you need to know
For most eligible PCs, KB5101650 arrives through Windows Update and includes the month’s security fixes, reliability changes, and improvements previously tested in the June optional preview update. You do not need to install the preview update first.
There is one important exception. Microsoft says the update may be temporarily unavailable for a limited number of Dell devices with Intel processors because of a reported incompatibility. The safeguard is intended to avoid unexpected shutdowns, poor performance, increased heat, and battery drain on affected models.
If Windows Update does not offer KB5101650 on one of those devices, do not force the installation from an unofficial download source. Wait for Microsoft and Dell to resolve the compatibility block.
Main changes in KB5101650
| Area | What changed |
|---|---|
| Security | Includes Microsoft’s July 2026 Windows security fixes. |
| Office-related apps | Fixes a problem that could stop some third-party apps using OLE Automation from opening Office or documents. |
| Networking | Enforces registration requirements for third-party TDI transports; software using an unregistered transport may stop connecting. |
| Keyboard shortcuts | Changes hotkey cleanup behavior; restarting an affected app may restore a shortcut that temporarily stops responding. |
| Recycle Bin | Fixes more cases where a permanent-delete confirmation showed an internal file name instead of the original name. |
| Windows curl | Updates the built-in curl tool to version 8.21.0 with security improvements. |
| Remote Desktop | Adds SHA-2 certificate thumbprint support for trusted RDP publishers while SHA-1 remains temporarily available for compatibility. |
| Recovery | Delivers the generally available Windows 11 Point-in-time Restore capability to supported builds. |
The update also refreshes several AI components on Copilot+ PCs. Those components do not install on every Windows 11 device.
Should you install it?
Security updates are designed to keep supported Windows systems protected, so most users should install KB5101650 when Windows Update offers it. Before restarting, save open work and make sure important files are backed up.
Pause and check the official release page first if:
- Windows Update says the update is not available for your device.
- You use a Dell PC with an Intel processor and the update is being withheld.
- Your organization depends on older networking software that uses a third-party TDI transport.
- An IT administrator manages updates, Remote Desktop publishers, or security certificates on the PC.
As of July 15, 2026, Microsoft says it is not aware of issues in the installed update itself. The Dell availability warning is listed separately as a temporary safeguard, so both statements can be true: no general known issue is listed, while some devices are prevented from receiving the update.
How to install KB5101650
- Save your work and connect a laptop to power.
- Open Settings.
- Select Windows Update.
- Choose Check for updates.
- Install KB5101650 if Windows Update offers it.
- Restart when Windows asks you to do so.
Windows Update normally handles the servicing stack and cumulative update together. Manual Microsoft Update Catalog installation is mainly useful for administrators and repair situations. Avoid third-party sites that repackage Windows update files.
How to confirm the update installed
Press Windows + R, enter winver, and select OK. The resulting window should show one of these builds:
- Windows 11 24H2: 26100.8875
- Windows 11 25H2: 26200.8875
You can also open Settings > Windows Update > Update history and look for KB5101650.
What to do if installation fails
Start with the error code shown by Windows Update. A code is more useful than a generic “installation failed” message because it can point to storage, servicing, driver, or network problems. Our error code guide explains how to record and check it safely.
Then try these low-risk checks:
- Restart Windows and check for updates again.
- Make sure the system drive has free space.
- Disconnect a VPN temporarily if your organization allows it.
- Check the official Windows release health dashboard for a new safeguard or known issue.
- Use the built-in Windows Update troubleshooter before downloading repair utilities.
If the update is deliberately blocked for compatibility, repeated manual installation attempts are unlikely to help.
After the update
Check the programs and hardware your work depends on. Pay particular attention to older networking software, Remote Desktop configurations, Office automation tools, keyboard shortcuts, thermals, and battery behavior.
If a program stops connecting after the update, ask its vendor whether it uses an unregistered third-party TDI transport. If an app shortcut stops responding, Microsoft says restarting the affected app may resolve the rare hotkey issue.
Official sources
Microsoft maintains the current details on the KB5101650 support page. For newly discovered safeguards and known issues, check the Windows release health dashboard.
FAQ
What is KB5101650?
It is the July 14, 2026 cumulative security update for Windows 11 versions 24H2 and 25H2.
Which Windows builds does it install?
It installs OS build 26100.8875 on Windows 11 24H2 and 26200.8875 on Windows 11 25H2.
Why is KB5101650 not showing on my Dell PC?
Microsoft may temporarily withhold it from a limited number of Dell devices with Intel processors while Dell and Microsoft resolve a compatibility problem.
Does Microsoft list any known issues?
As of July 15, 2026, Microsoft says it is not aware of issues in the installed update. It separately lists the temporary Dell availability safeguard.
Does the update include Point-in-time Restore?
Yes. The July general-availability build delivers Microsoft’s new built-in recovery capability to supported Windows 11 systems.
Where should I download KB5101650?
Use Windows Update or Microsoft’s official Update Catalog. Do not download repackaged update files from third-party sites.