My Windows 7 PC won't boot. There have been no software or hardware changes (potentially a windows update was applied that I don't know about, shutdown one night, all OK and then couldn't boot up the next morning). I get the windows 7 logo, then a black screen with mouse cursor, but I can't move the cursor. There's no keyboard response either (I don't think this is the infamous black screen of death as this typically still responds to a CTRL+ALT+DEL?). Safe Mode is no different apart from seeing drivers load, it stops at CLASSPNP before pausing for a while and then the black screen. Managed to run the startup recovery tool, although I only get this option sometimes when trying to boot. It scans but can't auto fix the problem but reports a corrupt registry (I don't believe this is the problem though). I removed my boot drive (which is an OCZ SSD) and mounted as a secondary drive in another PC so I could browse files on that drive. So I managed to restore my registry files from the windows backup files (windows\system32\config\regback), then replaced my SSD in my PC, but still no boot (which is why I don't believe it's a reg problem). I swapped out the SSD to my other PC again, this time I ran a chkdsk on my SSD, it found some small problem, nothing major so I fixed it successfully and swaped back to my original PC again, but still no change, still not booting. I swapped it out again, this time I had a look at ntbtlog.txt, it shows lots of inf's not loading (CLASSPNP being the last one to load... as above)... so I assume this is the problem but I have no idea why these won't load. Any advice please... tearing my hair out here!!! Thanks. Search the forums a lot but everything I find hasn't helped yet.