11 [verified]: Unarc.dll Returned An Error Code 11 Windows

The unarc.dll file handles decompression. Error code 11 specifically indicates:

Comprehensive Guide to Fixing "unarc.dll returned an error code 11" on Windows 11 unarc.dll returned an error code 11 windows 11

The installer files themselves are damaged, often due to an interrupted download. The unarc

The installation file itself was damaged during the download process. unarc.dll returned an error code 11 windows 11

Under Virus & threat protection settings , click . Toggle Real-time protection to Off .

Go to > Advanced options > Startup Settings and click Restart . Upon reboot, press 4 or F4 to enable Safe Mode .