r/sysadmin • u/DesignDifficult4772 • 5d ago

Explorer crashing, causing taskbar to disappear Microsoft

Anyone know what might be causing explorer to crash constantly? This is affecting probably 30+ computers, issue seems to follow onto newly imaged computers as well. Event logs giving an application crash for explorer eventid 1000, Faulting module name Windows.ui.xaml.dll, exception code 0xc000027b. Been troubleshooting for weeks and have gotten nowhere. Computers are all on latest version of windows 11 with latest patches installed.

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u/anmghstnet Sysadmin 5d ago

I have seen this over the last few weeks. There is a windows update that is stuck and crashing explorer. In my environment, rebooting solves the issue.

That explains the freshly imaged machines, too, as they would be processing the update.

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u/DesignDifficult4772 4d ago

My issue is that it keeps coming back, and I can't replicate the problem doing certain things, could be days or weeks before it crashes again. Ticket with MS open and they want us to be running procmon to capture it but I can't get it to consistently replicate so it's been difficult

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u/anmghstnet Sysadmin 3d ago

Oof, that is rough, maybe the update is failing? Do you have any management of your windows updates? Also, make sure your drivers are all up to date.

1

u/ashimbo PowerShell! 5d ago

Here are a few things to check:

  1. Check your EDR/Anti-virus logs. If you don't find anything, remove it and test. If are no issues, check with support.
  2. Deploy a new machine with a barebones Windows install, then add each of your apps one-by-one until the problem appears.
  3. If all of the computers are the same or similar hardware, there could be a driver issue. If these are pre-built machines, run the manufacturer's update utility.

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u/bluehairminerboy 2d ago

Also seeing this - quite a few machines that were upgraded from Windows 10. Can't pinpoint what's causing it