Can you try booting into Safe Mode? I'm wondering if a driver issue might be de-railing your PC. If it boots successfully (in safe mode), that might give you a chance to install the manufacturer's drivers for your devices instead of the generic Windows drivers.
Does changing the configuration of RAM sticks help any? Do you know if you might have bad memory? Might be worth trying Memtest 86+.
If you can boot to safemode, you might want to try the command prompt: chkdsk /r
Seems unlikely, but maybe the issue could be related to bad sectors on your hard drive corrupting your Windows install