Try system restore to before the changes. Good luck!
As to updates, maybe you can just disable them until you can get a newer card.
I have a Dell Dimension 8200 with Windows XP. My graphics card is NVidia GeForce Ti4200. My computer had been fine until I found it with display problems, many vertical multicolored lines across the screen, garbled, grainy. My son had plugged in his IPOD to charge it up. It seems to freeze up with that. I disconnected the IPOD and powered down the computer and have had trouble rebooting successfully since.
I have researched this and found many, many others who had this NVidia card also having exact same issues ..display problems with vertical lines across screen, system hang-ups or monitors going to power save mode, especially with high demand applications, and trouble re-booting. Though many insist the card is bad, some say the solution was uninstalling new drivers and downloading an older version. Others made fixes to the BIOS. (For examples see http://www.hardwareanalysis.com/content/topic/3878/?o=60, SuPeR Xp Mar 09, 2004, 01:16am EST post, J C Feb 20, 2004, 12:45pm EST post, JOh Doh Jan 23, 2004, 02:22pm EST). These are old posts, but mine is an old system.
My question is ... If the problem is an update which doesn't work with this older graphics card, can I fix this with a simple system restore to a date preceding the update? Seems like these issues first occurred just after I approved a Microsoft update a couple of weeks ago. The system recovered the first time, not the second. Is there a way to list updates to a system in XP Pro? Does anyone have any other suggestions? My 2009 Turbo Tax file is ready to send out on my desk top and I REALLY don?t want to redo them on my laptop.