You can try...

I suggest you visit the spyware, virus and security forum here for any other pgms. to use and post your results as well for further help.

You can boot into safemode and then try using whatever malware scanner and allow it to run. You can also boot into safemode "with networking" to allow access to CDs and flashdrives for pgms. gotten from them as well. Now, while no restore discs came with your Acer PC, it does offer some restore creation for self-made discs. That's too late now as you maybe helping recreate the malware if present to return. However, once the PC is running 100% you can generate them, then. Acer does offer recovery discs for small cost, thus order from them if in stock for your model#.

Next, you didn't mention how you got that game causing all problems. Under typical installs it shouldn't be causing all these issues. So beware of your source of any future games. Last, check to see if your system restore(points) from the OS actually is enabled. Under win7, in the control panel you can check that. Also, the OS provides a restore/backup NOT the immediate restore point feature but a true backup/restore from discs. You can also if you have a friend's PC generate a "repair disc" of the same win7 type(32 or 64-bit) to help also in returning some normal function back. This is the same function if you have the true restore(recovery) discs as well. Hopefully that can return possible missing OS files and/or be kept for later use when needed.

http://www.howtogeek.com/howto/5409/create-a-system-repair-disc-in-windows-7/

http://windows.microsoft.com/en-us/windows7/products/features/system-restore

tada -----Willy happy