The Unarc.dll error code 12 typically occurs when the Unarc.dll library is missing, corrupted, or not properly registered on the user's system. This can happen due to various reasons, including:
: Real-time protection can flag decompression as suspicious and block it. Pathing
Go to > Advanced > Performance Settings > Advanced > Virtual Memory .
Here is a step-by-step guide to fixing it, ranked from the most likely solution to the least.