Medium Operating Systems ✓ Solution Verified by Community (54+ upvotes)

How to fix error unknown-crash in Windows 11

Error code UNKNOWN_CRASH — community-reported fix.

✅ 70% success rate
👥 54+ users verified
📅 Updated: 2026-08-12
⏱️ 15 min read
Source: StackExchange Community · How we verify fixes
Error Codeunknown-crash
Affected SystemWindows 11 (Microsoft)
DifficultyMedium
Estimated Time15 min
Requires Admin Rights⚠️ Yes
Requires Reboot🔄 Yes

Solution Steps

  1. 1 Capture full screen: Ctrl + Skift + Prntscrn
  2. 2 Capture window: Alt + Prntscrn

Alternative Solutions

Method 2 (35 upvotes)

  1. In powershell: Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
  2. Adding Sublime Text 3 to the "Open with" list (It can't be because of this can it?)
  3. Back in Windows 8; Adding a few things to the RMB menu of some files (no trouble at all)

Method 3 (15 upvotes)

  1. Insert your Windows 7 DVD or mounted a Windows 7 ISO
  2. Run setup.exe from the DVD/mounted ISO
  3. during setup select upgrade

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