I've tried to:
- Disable all services/startup programs in msconfig (including microsoft ones)
- Check the disk for errors
- Starting up in safe mode (works just fine)
- Event Viewer (no description of the shutdown just error id 6008)
- Doing a System Restore causes the computer to shutdown failing to complete the restore.restauro
I am out of option here but the last thing I want to do is to reset the windows.