Hello Tony,

If your Windows 7 computer is set to only update Windows every month you might (like me) have fallen foul of the last Windows Update fiasco. The update KB2887069 has a problem and has resulted in many folk having restart problems. After installing this update the computer will continue to say updating or continually restart. It can delete sound drivers and in my case with a Lenovo corrupted my logon. The advice for those affected was to start in safe mode and disable automatic Windows updates then uncheck this KB2887069 update. If you (can)Google KB2887069 you can read all about it.

Your case might differ but I posted this just in case in helps you or others.

Have a Happy Christmas

Ian