Presario S5000V w/upside down video

I am trying to provide some long distance help for an my aunt with a
Presario S5000V. She told me that her video has recently started to show
upside down. I walked her through a few t/s procedures, but before I have
her try to reload drivers (or drive the 200+ miles to do it for her) I
wanted to ask some advice from some of you who may have seen this before.
Here are a few details..

She is running XP Home edition
The monitor is right side up ( I just had to make sure)
As it boots, the info is right side up until XP loads, then it flips.
I walked her through most of the video adapter settings and couldn't find
any that would cause this. In Safe mode it is also upside down, so I
couldn't see it being refresh rate, color or resolution related.
She hasn't loaded anything recently, w/exception of automatic updates. She
ran a Norton's virus scan with no viruses reported.
v/r
TJ

Think about this solution, because the upside-down video happened to
me...Anti-virus software and two anti-spy software packages were in
place, so I did not panic...Then I said to myself, "Just go back and
'Restore' the computer to the last good setting!" And it worked!!!
Keep It Simple, Smartie (KISS). Gotta go now... (Les)