your computer is having a BLAST!!!!
source:
http://securityresponse.symantec.com...ster.worm.html
W32.Blaster.Worm is a worm that exploits the DCOM RPC vulnerability (first described in Microsoft Security Bulletin MS03-026)(users are recommended to patch this vulnerability by applying Microsoft Security Bulletin MS03-039) using TCP port 135. The worm targets only Windows 2000 and Windows XP machines. While Windows NT and Windows 2003 Server machines are vulnerable to the aforementioned exploit (if not properly patched), the worm is not coded to replicate to those systems. This worm attempts to download the msblast.exe file to the %WinDir%\system32 directory and then execute it. W32.Blaster.Worm does not have a mass-mailing functionality.
Additional information and an alternate site from which to download the Microsoft patch is available in the Microsoft article, "What You Should Know About the Blaster Worm and Its Variants."
We recommend that you block access to TCP port 4444 at the firewall level, and then block the following ports, if you do not use the following applications:
TCP Port 135, "DCOM RPC"
UDP Port 69, "TFTP"
The worm also attempts to perform a Denial of Service (DoS) on the Microsoft Windows Update Web server (windowsupdate.com). This is an attempt to prevent you from applying a patch on your computer against the DCOM RPC vulnerability.
Click here for more information on the vulnerability that this worm exploits, and to find out which Symantec products can help mitigate risks from this vulnerability.
NOTE: Virus definitions will detect this threat having:
Defs Version: 50811s
Sequence Number: 24254
Extended Version: 8/11/2003, rev. 19
Symantec Security Response has developed a removal tool to clean the infections of W32.Blaster.Worm.
removal tool
go to the site for better understanding
http://securityresponse.symantec.com...ster.worm.html