Nvidia problems

I have a Geforce4 MX-440 AGP with 64 MB that I bought at Best Buy last June so
that I could have one card running my two monitors.

Ever since then I have had lock-ups and aborts. I turned off auto start in my
WINXP Pro machine, and shared my aborts with a different newsgroup, and
everybody said my aborts were due to driver problems. Some times my machine
stops, other times, the mouse is working over a background that doesn't get
updated. In the latter case, I can sometimes move a window from one monitor to
the other to get a refresh. But usually I have to press the off button to
reboot.

When it aborts, I often get a Microsoft Web page that doesn't think there is
anything wrong. I have no idea why it opens my browser, recognizing there's a
problem, and then doesn't know about it.

I check the http://www.nvidia.com site daily to see if there is a release more
recent than 45.23.

I haven't found any place to share my problem where Nvidia might find my
experience useful to fix this bad problem.

Does anybody have any suggestions?