Have you tried the prevx fix?
http://www.prevx.com/blog/140/Black-Screen-woes-could-affect-millions-on-Windows--Vista-and-XP.html

"Paul H" wrote in message
...
Yup, that's it! I just did a 20 plus issues upgrade! I hope they provide
the antidote soon!

"Jasper" wrote in message
...

This could be it
http://www.tomshardware.com/news/Mic...eath,9171.html

"Paul H" wrote in message
...
32 bit W7 home premium - did upgrade, not new install - everything worked
fine for a few weeks - I was working today, had a few screens open, when
the
desktop went black. Nothing would revive it. I had to force a power
down,
then start it up. Has anybody else experienced this? Or is it maybe my
laptop, an Acer 5810TZ, with 3 GB and 320 GB. TIA, Paul