As you have the 8800gt you need the 8 series

If your system works fine in XP, that's because the drivers are loaded and working correctly. In Vista, you haven't loaded the drivers for the card for Vista.

Your card is in the 8 series. Here's the link for the drivers for your card for Vista 32-bit:

http://us.download.nvidia.com/Windows/175.19/175.19_geforce_winvista_32bit_english_whql.exe

Download then run this file in Vista, reboot when prompted.

By the way, Microsoft will support XP for a few years yet, see here:

http://www.informationweek.com/news/windows/operatingsystems/showArticle.jhtml?articleID=208800494

AND

if you enjoy playing games like Crysis, it would go a whole lot better with another 8800GT running in SLI.  see here:

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=130252783761

yes it's mine apologies for the cheap plug :)

Good luck.

How do I know what Series I need?  The options are:

200 Series

9 Series

8 Series

7 Series

6 Series

5 FX Series

4 MX Series

Thanks so far!

you need to go to nvidia's website and download drivers for your video card.  Just go here

http://www.nvidia.com/Download/index.aspx?lang=en-us

and pick from the choices in the combo boxes to find the right driver for vista 32 bit.

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@EmoFlogger wrote:
Thank you.  I was thinking that but I wasnt sure.  I wont have to upgrade the drivers or anything after this will I?  Just wondering since I dont want this to happen again.

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Sometimes new driver releases will fix problems with certain software or make things run faster, so you might want to update occasionally.  Also, don't forget to update any other drivers for vista that might be available.