While you are conveniently surfing suddenly a message appear stating that your PC will automatically turn off after a few seconds. Most of the people panic when they experience this kind of attack but this is cause by a virus named MSBLAST.EXE. But What is the MSBLAST.EXE worm, msblast.exe is also known as Blaster.A, LoveSan or Msblast.A. This worm infects computers via network connections. It can attack entire networks of computers or one single computer connected to the Internet. The worm exploits a known windows vulnerability that is easily patched, however few systems seem to have this patch installed. It attacks Windows 2000 and Windows XP machines and exploits the DCOM RPC Vulnerablity. Depending on the system date it will start a Denial of Service attack against windowsupdate.com, this makes it difficult to download the needed patches and allow the worm to infect as many machines as it can before being disabled. To lessen the impact from this denial of service attack Microsoft decided to kill the windowsupdate.com domain. MSBLAST can also cause widespread system instability including but not limited to Windows Blue screens, out of memory errors, changes to Control Panel, inability to use functions in browser, and many more oddities.