hi there guys, i'm new here.....very noob bout computing....
my pc got a problem...and i assume it should go to this place right? Sorry if its the wrong place...
anyway, here it goes, my pc seems to be restarting when i shutdown my pc. i've clear the automatic restart,
and a blue screen appear at the end of shutdown,but it doesnot shutdown,
here is the stop message

"Stop : c000021a (fatal SystemError)
The windows logon process system process terminated unexpectedly with a status of 0x00000000 (0x00000000 0x00000000)
The system has been shutdown"

i've done some digging, itseems that it occur when i installed the iTunes from Apple.
i'm not quite sure,i can't do the system restore cause the system need to shutdown instead of restart from failure.
when i did the system restore, the message i got when it restarts, "the system restore is incomplete...."
i've done it several times, and still could not do the restore,
i even run in safe mode and try the system restore but it does the same result.

Please.........could somebody help me
Now, i have to press the Power button when it restarts to shutdown....

Thanks in Advance