Hi, I'm not computer savvy and I have joined this group out of shear frustration. I don't even know if I'm in the right group, but here goes. I've had my HP desktop for 2 years without a problem, now I'm getting this message (see title) in the bottom right corner. I've contacted HP and microsoft and both blame each other and both recomend that I re-format my computer. I was wondering if there was a less drastic alternative that someone might be aware of. I've tried system restore. And I've tried entering my product key which keeps coming up as invalid even though It's on my tower. Can I restore to factory defaults ?..... What should I do ???