After a short time period of 5 minutes or so, you may get a message that states "Your computer will restart in one minute" and then counts down.
This is typical behavior for the Sasser worm. The worm will cause the LSASS component of Windows to crash, according to analyses. Infected systems will then perform a 60-second countdown before restarting.
For help in protecting your computer and cleaning of the worm
using best antivirus.