My computer shut down and restart on her own

[Robert]

When I am online after a few minutes the computer shut
down and restart again showing a message from NT
AUTHORITY/SYSTEM and something about REMOTE PROCEDURE CALL

 

[war17]

W32.Baster.Worm is likely causing the problem. Worm is exploiting the
vulnerabilities of the RPC interface.

http://www.microsoft.com/security/incident/blast.asp

Update your virus definition and scan your computer.

Remove the worm with the removal tool
http://securityresponse.symantec.com/avcenter/venc/data/w32.blaster.worm.rem
oval.tool.html

Download the latest security batch from Microsoft

Exploitation of Vulnerabilities in Microsoft RPC Interface
http://www.microsoft.com/security/security_bulletins/ms03-039.asp

If you don't have enough time to download and apply the patch before the PC
reboots,

Go to start > run > Services.msc.
Right click Remote Procedure Call.
Select Properties > Recovery.
On all three drop-down boxes in this window, select "Take no action."

This fix will give you the time to update.