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How To Fix Unarc.dll Error Code 12 [new] Jun 2026

Open the Command Prompt as an administrator. Input the below instruction and press Enter: regsvr32 /u unarc.dll Wait for the message “DllRegisterServer in unarc.dll succeeded” to display. Enter the below command and hit Enter: regsvr32 unarc.dll Reboot your computer.

Verify your Windows operating system is up to date. Go to Settings > Update & Security > Windows Update. Refresh your device drivers. Go to Device Manager > Action > Scan for hardware changes. how to fix unarc.dll error code 12

Method 8: Check against Malware