aw geez guys! sorry to hear that! hmmmm....
did you delete ALL the files related to the Balder's Gate try-out?
you did the ScanDisk Wizard and virus scan before you download it right?
tech tip for users: I always ran the ScanDisk, defrag, virus scan, and restart the computer BEFORE I install the game.
Plus close few of the running programs (little icons on the bottom right of your Start bar such as: MSN, AIM, RealPlayer, Yahoo Messenger, WinAmp, etc) would make the game run easier. (don't ask me how but it worked for my little Win98 PentiumII Gateway)