Unarc.dll Returned An Error Code 11 Windows 11 (2026 Release)

Before jumping into fixes, identify which of these scenarios matches your situation:

Verify free space. If it is low, delete unnecessary files or transfer files to another drive. 3. Increase Virtual Memory (Paging File) unarc.dll returned an error code 11 windows 11

Windows 11 will reboot into a blue diagnostic screen and test your memory modules. Before jumping into fixes, identify which of these