Advent,
Please insert a screen-shot of the blue screen problem. Press "PrtScrSysRq" in the middle of "Scroll Lock" and "F12" then press Ctrl + V to past into Paint, then upload the screenshot in an attachment, do this by clicking Manage Attachments when applying to a topic. Your only way now is to scan your entire computer for viruses and other unwanted software. I suggest downloading
Spyware Doctor (link, PC Tools) - Scan your computer for Spyware. You can search for Adware programs on Google or Download.com, scan your computer for Spyware, Adware, Trojans and Malware - Malicious viruses.
I recommand downloading Windows Defender from Microsoft. (Note - Windows Defender is only for Genuine Microsoft Windows!) If you have a legal copy of windows, installing Windows Defender should be easy. If you have an illegal copy of windows then you cannot get any programs used for Genuine.
Make sure you have allowed the file to be added to your registry. To see if you have the Vice City file in your registry go to Start > Run type "regedit.exe or just regedit". Then search the folders. These problems are mostly because of Trojans and Malware removing your system files. It is recommanded that you remove all of the viruses from your computer, failing to do so will leave your computer in danger! If you have noticed alot of files missing and getting an unknown error with "This file might be corupted or may have a virus" then scan your computer strate away! AVG Anti-Virus is good for detecting viruses. They will notify you if you have a "Trojan.backdoor" < they are very harmful to your computer, and can do more danage then other viruses. Like Worms etc.