Hopefully its a software issue so do try to reinstall windows. if that doesn't work download ubuntu (www.ubuntu.com) or bartPE as the above user said and back up your files to a flash drive. then format and start over with windows.
I did have a similar problem with a laptop virus that essentially wiped out the bios chip. good luck and i hope its not that thing
Thank you very much for your reply and advice, I will definitely try your ideas and see what happens.