You STILL haven't described the EXACT problems you are having, you are giving information piecemeal (it won't shut down, you're trying to install XP, you can't get into the bios, now you're getting a blue screen error). PLEASE - start at the beginning and provide us with COMPLETE AND EXACT details of the problem(s) you are having.
Second, tell us about your system and what is new or different since the last time everything worked properly (ie, new hw, new sw, virus, error, etc)?
Last, Download BlueScreenView:
http://www.nirsoft.net/utils/blue_screen_view.htmlunzip downloaded file and double click on BlueScreenView.exe to run the program.
when scanning is done, go to EDIT - Select All
Go to FILE - SAVE Selected Items, and save the report as BSOD.txt
Open BSOD.txt in Notepad, copy all of the content, and paste it into your next reply