Ensure the drive you are installing to has at least double the space of the final game size to accommodate temporary extraction files. If you want to troubleshoot further, tell me: What game or software are you trying to install? How much physical RAM does your PC have? Are you using a repack installer (like FitGirl or DODI)? Share public link
is a common Windows error that interrupts video game installations [1, 2]. It usually happens when unpacking highly compressed files (like repack games) [3, 4]. The error means the decompression process failed because data became corrupted or the system ran out of resources [2, 4]. how to fix unarc dll returned an error code 1
It usually means the archive is , incomplete , or there’s a problem with system files/RAM . Ensure the drive you are installing to has
If using a repack installer, check the box to "Limit installer to 2GB of RAM usage" if available. 3. System File & DLL Repair Are you using a repack installer (like FitGirl or DODI)
Select under the Virus & threat protection settings heading. Toggle Real-time protection to Off .
Lack of space on your installation drive or the C: drive (where temp files are stored) can trigger this error.
to a higher value like 35,000 MB (35 GB) or double your physical RAM. 2. Disable Antivirus and Real-Time Protection