>I tried upgrading to an AMD Radeon card and it worked fine to until the graphics driver update
My laptop (using an NVidia card) is only stable with older drivers.
Unless your talking about the transition from standard VGA to AMD drivers...
If you haven't already
* check online for compatibility issues between the make/model of your PC (or motherboard if the PC is a custom job) and the AMD card. It may be a hardware compatibility issue.
* check to see if there's a bios update available for you system, if so check the change log to see what issues it addresses.
* I'm assuming that you have already tried reseating the card & cleaning the contacts.
Personally I've had more problems going from NVIDIA GEForce to AMD Radeon cards than the other way around.
>how to make sure all of the drivers are truly purged?
Under Program & Features check for programs by AMD - you can use Google to check names to verify.
Run MSCONFIG and see if any AMD video driver or services are loading and disable.
You can try MSCONFIG's "Diagnostic Startup" which if I recall should put you in standard VGA mode see if that works.
When my bad NVidia card finally failed it would only work in standard VGA mode.
Hope this helps...