AP5000 All In 1 POS System Freezes At Windows 7 "Starting Windows" Screen. Logo Doesn't Even Show.

[bayres2016]

AP5000 All In 1 POS System Freezes At Windows 7 "Starting Windows" Screen. Logo Doesn't Even Show.
Bios works and I can reach the F8 Windows Boot Options. All options freeze at the "Starting Windows" Screen.
The screen freezes and goes blank if I try to choose "Launch Start Up Repair".
Safe mode freezes once it reaches "CLASSPNP.SYS".
Ive enabled and disabled all bios settings.
Ive tried several dual core CPUs and a Celeron 400 CPU.
Ive tried different DDR2 RAM. Ive tested the RAM using both short and extended tests and it passed.
Ive tried 2 hard drives and they work in other computers fine.
No Bluescreen message appears.
Used a USB to load HP vision diagnostics, the ram test it passes.
Tried both 32 Bit and 64 Bit Windows 7 Versions.
The Fan revs gradually higher when frozen on the WIndows Startup screen.
Tried with and without Keyboard, Mouse, MSR and VFD Screen connected.
Any help would be greatly appreciated.

 

[neatfeatguy]

Testing different hard drives on a system doesn't mean it's going to load into Windows. Sometimes Windows will load, but other times it won't.

If the main HDD for the computer won't get past Starting Windows - then there is some kind of corruption on the HDD. If there is important information on there that is need, then your best bet would be to connect the HDD as a secondary drive on a working computer and then copy all the important info from it to a flash drive. Then format and re-install windows.

Corruption is either files just became corrupted or there are physical issues on the HDD (bad sectors) that are causing problems. If the latter is the case, then it's time to retire the HDD and get a new one to install Windows on.