Your system lacks the memory required to handle the decompression algorithm.
The error "decompression failed with error code -11" is a common headache for gamers and software enthusiasts, typically appearing during the installation of large, compressed files like "repacks." This error signifies that the installation wizard—most often the Unarc.dll or ISDone.dll library—encountered a critical failure while trying to unpack data to your hard drive. What Causes Error Code -11?
Temporarily "Disable for 1 hour" or until the next restart. decompression failed with error code-11
Type in the Windows search bar, right-click, and Run as Administrator . Type regsvr32 isdone.dll and press Enter. Type regsvr32 unarc.dll and press Enter.
If you get an error saying the module wasn't found, you may need to download fresh copies of these .dll files and place them in C:\Windows\System32 . 💡 Key Takeaway Your system lacks the memory required to handle
Antivirus programs often mistake the intense CPU and disk activity of decompression for a malware attack.
Select your C: drive, click , and set the Initial and Maximum size to at least 16384 MB (16GB). Click Set , then OK , and restart your PC. 2. Disable Real-Time Protection Temporarily "Disable for 1 hour" or until the next restart
Re-enable your protection once the installation is complete. 3. Check for File Corruption
If the system libraries are the culprit, re-registering them via the Command Prompt can reset their functionality.