Hiya AB, sounds like you have lost startup files...........The fix: If its a laptop, remove hard-drive, keep hard-drive, then bash-burn-bury laptop. buy a new one and externally connect HDD to gain access to files.
If you have a newish desktop computer: remove hard-drive, and install a new HDD, format and load windows. Once again externally access your old HDD via cable and gain access to your old files.
If its an old desktop computer: bash-burn-bury