doesn't look like it has anything to do with windows 7; and is rather related to the failure of the on-board video due to excessive heat:
Most of these consist of an awful lot of heresay and mostly degrade into flames against HP. (And, oddly enough, Nvidia, even though they only made the GPUs that HP integrated into what it seems are agreed to be overall badly cooled laptops).
I imagine it
could be driver related, since when windows tries to load the driver it basically fails and tells windows "I can't load, there's something wrong with the hardware" Which can of course be caused by any number of things; for example, using the reference NVidia drivers with a laptop or integrated video, or the other way around. (usually those flat-out refuse to install, in this case your drivers ARE installing, they just refuse to load afterward).
http://h30434.www3.hp.com/t5/Display-and-video/hp-dv9500-screen-problem/m-p/220825/highlight/truehttp://forums.nvidia.com/index.php?showtopic=96155http://h30434.www3.hp.com/t5/Display-and-video/HP-Pavilion-dv9700-should-also-be-on-the-list-but-it-is-not-even/m-p/269521If the laptop is still under warranty, I'd give HP a ring, this definitely isn't an unheard of issue.
Hey how old is this laptop of yours?
Look at his first post. it's about a year old.