valinet / valinet/ExplorerPatcher
ExplorerPatcher stops working after update KB5089573 (Build 26100.8524)
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- Dominant language
- C
- Stars
- 33.9k
- Forks
- 1.4k
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Description
Before reporting your issue
- I have confirmed that this issue does not happen when ExplorerPatcher is not installed
- I do not have "register as shell extension" enabled
- I have tried my best to check existing issues
Repro ExplorerPatcher versions
26100.8457.70.1
Repro Windows Versions
System information
- OS: Windows 11 IoT Enterprise LTSC 24H2
- OS Build: 26100.8524
- Experience Pack: 1000.26100.315.0
3rd party tweak software installed
NULL
Describe the bug
ExplorerPatcher stops working after update KB5089573 (Build 26100.8524)
Describe the bug
After installing the 2026-05 Preview Update (KB5089573) on Windows 11, ExplorerPatcher stopped working. The taskbar and Start menu have reverted to the default Windows 11 style, and the customizations provided by ExplorerPatcher are no longer active.
To Reproduce
- Install the Windows 11 update KB5089573 (Build 26100.8524).
- Reboot the system.
- Observe that ExplorerPatcher settings are ignored, and the system uses the default Windows 11 taskbar/Start menu.
Expected outcome
Expected behavior
ExplorerPatcher should continue to apply the configured customizations (e.g., Windows 10/Classic Start menu) after the system update.
Actual outcome
Actual behavior
ExplorerPatcher is effectively disabled/inactive after the update.
Additional info
No response
Crash Dumps
No response
Media
No response
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the failure on Windows 11 IoT Enterprise LTSC 24H2, build 26100.8524, after installing KB5089573. Trace the ExplorerPatcher integration responsible for the taskbar and Start menu customizations and compare its behavior before and after the update. Done means the configured customizations remain active after reboot.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- desktop, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 50/100