I have the above model at home and was having issues with it not booting up into anything but safe mode. I was able to open in Safe Mode with NEtworking but the only HP update that would take was the Bios update which actually got it to boot up normally afterwhich I ran all the MS & HP updates that became available. At one point, the MS updates poped up with one .Net update that had to be downloaded by itself which I unclicked repeatedly in order to finish the other remaining downloads until it was the only one left. All was great with PC up to that point. Had defragged a couple of times, ran disk cleanup, removed unneccessary proprietary programs, etc. Just a good general clean up, then I did the last remaining .Net update and not it won't boot up at all except to a black screen. I can still get to the boot menu, et al, but I can't get to the safe mode menu so I can try to uninstall that last MS Update. Tried hitting F8, but didn't work and looked for instructions online to see if it was something else but no luck. Does anyone have any suggestions?