|You said that you logged as Administrator and did some scans. Does the computer shut down randomly when logged on to the administrator too? If not then you are still able to access the files stored under the user profile. It sounds like a corrupt user profile. |
Log on as Administrator, create a new user account. As administrator you can copy the files from the corrupt user account to the new user account. Don't copy the ntuser.dat files because that is likely the part that is corrupt. You can copy the favorites, desktop items, documents to the new profile. Then log on as the new user.