If you are encountering this error, try these steps in order:

If you need precise commands or tools

💡 Always avoid installing games into the C:\Program Files (x86) folder, as Windows permissions there are very strict. Create a folder like C:\Games instead. If you’re still stuck, tell me: What game are you trying to install? How much RAM does your PC have? Are you installing to an SSD or an HDD ?

FitGirl GTA V Unarc.dll Error -14. Game isnt installing :( : r/PiratedGTA

A corrupted download is a primary suspect. Here’s how to check:

in Advanced Power Settings to prevent the CPU from boosting to unstable temperatures.