You may have been experiencing an issue when you are online which causes your computer to shut down. In Microsoft Windows there is a security flaw which allows hackers to cause your computer to shut down. If you receive a message stating that NT AUTHORITY is shutting down your computer and you have 45 seconds to save all your work then you will need to follow the instructions below. If you have not already been affected by this problem then you may soon so please still follow these instructions. The only computers which are immune to this problem are the ones that have had a full Windows update in the past few weeks from Microsoft's website.
To prevent this problem from occurring immediately:
(Your computer will then no longer be affected by this problem. You will not need to be online to do this).
Click Start, Control Panel, Administrative Tools, Services, browse down till you see "Remote Procedure Call (RPC)". Right click on that, and click Properties. Click Recovery. In the boxes that say First, Second and Subsequent failures, browse down on the lists and select "Take No Action". Then just click Ok.
This will stop your computer from shutting down. (Hackers have found an exploit which takes advantage of Windows security feature which shuts down your PC in case a problem occurs -- This disables that feature).
Download the Microsoft Windows security updates:
(You will need to be online for this part of the instructions. If you followed the instructions above your computer will no longer be shut down so you will have no problem getting these updates).
Visit http://windowsupdate.microsoft.com and download all updates marked "security update" or "critical update". You can click on Remove for the rest, unless you just want to install those too. Either way it won't hurt.
If you would like more information about this problem then read the Yahoo! article at http://story.news.yahoo.com/news?tm...46233_2003aug11