well, if you downloaded the proper driver's from the company that makes your computer, then you should be alright. If you're still having problems, it is probably due to something else.
You said you have an ATI Radeon xpress 1100, which is a graphics solution, built into your motherboard.
Yes, all the driver's disappear. Windows can automatically reinstall some driver's, but the graphics driver's are a specific one you'll want to go download yourself.
I was thinking, and have you installed adobe flashplayer yet? Try downloading and installing this http://www.adobe.com/shockwave/download/do...=ShockwaveFlash
, and see if it helps at all.
"I think there is a world market for maybe five computers." - Thomas Watson, Chairman of IBM, 1943