How To Fix All isdone dll - unarc dll Error In Install Any Games 100 % Fixed Make sure you have enough Virtual Memory If you have 4 GB of RAM, set virtual memory to 8 GB (Custom size: set both initial and maximum size to 8192) If you have 8 GB of RAM, set virtual memory to 16 GB (Custom size: set both initial and maximum size to 16384). If you have 16 GB of RAM, set virtual memory also to 16 GB (Custom size: set both initial and maximum size to 16384) If you have 32 GB of RAM, set virtual memory also to 8