Rather doubt that it is the Blaster Worm. You are most likely receiving a bogus infection warning, or a fake alert, from a Rogue security program.
Try the following:
If you are able to get on the Internet, press on with the instructions that follow. However, if the infection does not let you download files to the infected computer, or you still have no Internet connection, download the files/programs requested below to a clean computer and then transfer them to the Desktop of the infected computer. You can use a USB flash drive, or other removable media (CD/DVD, external drive).
[If the file does not download, paste the following, >without the brackets<, in the address bar of your browser:
Also download Malwarebytes’ Anti-Malware (black button with green and white icon)
Save both programs to the USB flash drive, and then transfer to the Desktop of the infected computer.
To run RKill, double-click the program
A black DOS box briefly flashes and then disappears. This indicates the tool ran successfully.
Next, run Malwarfebytes’ AntiMalware and update the program.
Once updated, select 'Perform Full Scan' and click the 'Scan' button.
When the scan finishes, click OK in the message box, and you will see the results of the scan.
Click the ‘Remove Selected’ button to get rid of the malware.
When Malwarebytes finishes, you may be prompted to reboot. If so, reboot.
Please post the Malwarebytes log in your reply.
There may be more work to do...
Retired - Doin' Dis, Dat, and slapping malware.
Malware Eliminator/ Member of UNITE and the
Alliance of Security Analysis Professionals