Understanding the specific code can narrow down the cause of the failure: Error Code -1: Archive data is corrupted or decompression failed Error Code -7:

: Security software often flags the intense file-writing activity of a repack as "suspicious behavior." It may quarantine or block the installer from writing to the disk. Insufficient Permissions or Path Lengths : Windows sometimes restricts writing to the C:\Program Files directory or struggles with folder paths that are too long. Corrupted Downloads

Typical error codes and meanings (examples)

What unarc.dll does