G100 has no Display Properties tabs anymore after XP System Restore

My aunt's computer wouldn't boot (even in safe mode) after the power barely
went out yesterday. It's one of theose cases where it probably would have
done no harm at all if it would have completely gone off.
WELL: We managed to get it started by choosing the "last known good
configuration".
The network adapter AND the display adapter both had yellow excalmation
marks next to them in device manager.
I un-installed the network card and restarted XP. It re-detected it and it
installed itself.
THEN: I un-installed the G100 from within Device Manager and restarted. It
found a new decive and installed it as a Productiva G100.
BUT: Still no way to set the resolution or refresh rate.
If I go to diaplay properties I only get the tab for "THEMES"
I don't get Desktop, Screensaver, Appereance, or Settings (the important
one).
QUESTION: IN XP how do I remove every last bit of Matrox software from the
computer (it's never had drivers from Matrox.com installed on it and never
had Powerdesk on it either). It's always just worked fine with the default
XP drivers.
I want to be able to just re-install it as if it was a brand new card and
see if I get back all the display properties tabs.
At the moment, 2D is very sluggish and I have no way to set it higher than
60Hz refresh rate so it's hard on the eyes.