Roman writes in with a troubleshooting question:
Question:My keyboard and mouse freeze when the blue login screen appears so I cannot do anything. Anything I can do to fix that?
Answer: Have you tried booting into Safe Mode to see if you can get that far? If you can you may have something that is starting up with Windows that is causing it to hang but is not starting up in Safe Mode. If that's the case you may be able to boot into Safe Mode and then go into your startup items and uncheck all the non essential items or do one at a time to try and narrow it down.
You can also boot to Safe Mode and select Last Known Good Configuration to see if that will get you going.
Another option is to try a repair installation of Windows. This will reinstall Windows and keep your programs and files intact.
There is also a possibility of having a hardware problem. You can take out any cards such as sound and network and see what happens. If you have any spare RAM laying around you can try swapping that out too.