many times the restore point won't work. Have you tried an earlier date, look for a date in bold numbers.
If the restore won't work, you can still do a repair install of the operating system. This does not erase your files.
See this forum, sixth post from the top.
i have tried all of that. I don't know what a fire extinguisher is on the computer. The only thing I have been able to do is a factory default.