Have you done any updates other than the normal Windows updates recently Kevin (i.e. a graphics driver update)? If so I'd first try rolling back the update (uninstall it and return to the old driver).
Otherwise to try and make your computer more stable (as well as to try and determine for sure if this is your problem) try turning off HW accelleration:
1. Right click on your desktop
2. Select "Properties" from the context menu
3. In the "Display Properties" dialog select the "Setting" tab
4. Click ont he "Advanced" button
5. In the dialog box that displays select the "Troubleshoot" tab
6. In the "Troubleshoot" tab drag the "Hardware accelleration" slider all the way to the left (None).
7. If the "Enable Write Combining" checkbox is available, clear it
8. Click OK to dismiss all open dialogs
If your problem does not resolve like this then I'd say it's not your display driver that is causing it.
Good luck.
