Countdown and computer shutdown is s sign
of the blaster worm / virus.
There are a special patch at Microsoft and a virus remover tool
at symmantec to deal with this.
Both can be find at Symantecs websita, and description about how
to do.
But by all mean, it can be something else...
GJ
_________________________
Cheers 🥂
GJ
_______________________________________________
"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)