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Windows 10 Crashing on CLASSPNP.SYS in safemode and startup repair.
I've just upgraded Windows 7 64-bit HP OEM to Windows 10 Technical preview 64-bit. Extracted the install while booted within 7, install went smoothly, opted to keep all my files, and once the install was finished it went to boot Windows 10. It hung on "Starting Windows", so I restarted and went to "Startup Repair". After loading the files it just stayed as a black screen and no longer loaded. Went to boot in Safemode, and it gets stuck on loading \Windows\system32\drivers\CLASSPNP.SYS.
EDIT: I've now attempted to do a complete reinstall, and created a bootable USB drive, and it would also fail to boot that. Tried booting from DVD, also crashes during the boot to that. Even attempted reverting back to windows 7 and put in my old install disk to do that, also crashed. I can now no longer boot to anything windows related since installing windows 10. I can boot a live ubuntu CD, as well as Ultimate Boot CD (freeDOS), so I ran a memtest, CPU load test, HDD SMART test, and just about every other test on my hardware I can think of using my Ultimate Boot CD and my hardware is apparently fine with no faults. I just can't boot anything related to windows. Completely stuck, really need help.
Last edited by Vianim; 22 Jun 2015 at 18:51.