I'm facing an issue with users upgrading to Windows 11 on their persistent Horizon VMs. About 10% are experiencing crashes with Office applications like Outlook, Word, and Excel. The crashes can happen instantly when launching the apps or after a few hours of use, prompting a 'This app must close' error. Rebooting the machine seems to temporarily fix the problem for 6-10 hours. The specific error from Excel is: 'We're sorry, but Excel has run into an error that is preventing it from working correctly. Excel will need to be closed as a result.' I've tried various troubleshooting steps, including creating brand new VMs, reinstalling the VMware Agent and tools, and updating Office. I also cleared the Office caches and disabled all COM add-ins, but nothing seems to work. Even running Excel in safe mode leads to crashes. Any advice on how to resolve this?
3 Answers
You might want to try disabling hardware graphic acceleration for Office. There’s a guide [here](https://thegeekpage.com/how-to-disable-hardware-graphic-acceleration-for-ms-office-version-2019-2016-2013/). Some users found that helpful, but I understand you said it also crashed in safe mode.
Consider removing Office entirely, perform the in-place upgrade, and then reinstall Office. This could potentially resolve underlying issues that are causing the crashes.
Have you checked the event logs for any specific errors related to these crashes? They might give you more insight into what's going wrong.
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