Help. I did a full load of BGll-SoA. Game worked fine then. Then I did a full load with BGll-ToB. Game worked fine for 2 times then when i played game again, i got the window to install BGll-ToB instead of window with play button . I have lost my game twice because of this. Anyone who can help?

Sounds like your registry entries are messed up. I don't know exactly the names and values of all the registry keys that BG2 adds but try loading up regedit from start menu-> run and searching for keys containing Baldurs gate 2 and looking for values called something like installed=0 etc. then change it to 1 maybe. I hope this helps somehow.

Same damn thing happened to me! I unistalled everything, then reinstalled. Dont worry if you decide to do that, your saved games remain intact.