I don't have a disk for the OS. An update is that after numerous power down power up cycles, all of which sent me directly to the Logging off screen, the computer finally booted up when I powered up. I then got a message popping up that several Microsoft updates had been installed. I downloaded them the day before but didn't restart the computer. Now I am wondering if I should restore to an earlier point just in case I caused a problem by powering down and up during the Win update process. I waited 30+ minutes before doing so, so I feel that the process must have been completed. Any help would be appreciated.