Wait for the process to complete, then type the following command and press Enter: sfc /scannow

Type chkdsk /f /r C: (Replace C: with the drive where you are installing the game).

Set the and Maximum size to a higher value. A safe bet is to set both to 1.5 × your physical RAM in MB (e.g., for 8GB RAM, set them to 12288 MB). Click Set , then OK , and restart your computer . 5. Re-register Unarc.dll and ISDone.dll

Before diving into the fixes, it helps to understand what is happening under the hood.