Computer Wizard Needed!!!

[Tark Volmar]

First I have Windows XP. Now I have recently loaded my Throne of Bhaal game and have been enjoying the heck out of it. There is one big problem though. Every so often I go to play it and the "Install" part of the program keeps coming up. This has happend quite a few times now and the ONLY way that I found to repair this is to uninstall the whole game and start from Sq. one with Shadow of Aham and reload the whole thing. Now when this "Install" thing happens I still have all my files for the game and it seems that nothing is missing. Even on the "Install" part I try and click install and nothing happens. Now before this happend I was playing the game just fine and shut it down like normal, but the next time I go to play it the "Install" part of the game comes up instead of the "Play" part. I can't see anythine that I or my computer are doing wrong. I will say that I have Norton System Works 2002 and I regularly do a Clean Sweep and then Empty my trash. I have always done this before and I never seemed to affect my game. I am at a complete loss as to why this is happening and it also is a MAJOR pain in the A** when this happens. Can any of you Computer Wizards out there give me any clues as to what might be happening. Because I am really getting fed up with having to unistall and re-install this whole game. I would much prefer just to PLAY!!!!!!
Thanks
Tark Volmar