You are most likely receiving a bogus infection warning, or a fake alert, from a Rogue security program.
Try the following:
Get into Windows Vista Safe Mode with Networking:
Start your computer.
Tap the F8 key before Windows starts, to bring up the Windows Advanced Options menu
Use the arrow keys to select >Safe Mode with Networking<
If you are able to get on the Internet, press on with the instructions that follow.
If not, copy and paste the URL of the file to download directly into the address bar in your browser, and then press: Enter
(Do not click on the Url, or you will get redirected.)
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:
Save to the Desktop.
Vista/Windows 7 users right-click and select: Run As Administrator.
A black DOS box briefly flashes and then disappears. This indicates the tool ran successfully.
If not, delete the Rkill file, then download and use another Rkill file:
If it still does not work, repeat the process and attempt to use one of the remaining versions until the tool runs, as some malware variants try to block it.
Without a reboot, download Malwarebytes’ Anti-Malware (black button with green and white icon)
Save to the Desktop
For Vista or Windows 7, rihgt-click and select: Run as Administrator
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 so we can see where we are at, and plan any additional removal strategy, if necessary.<<
Retired - Doin' Dis, Dat, and slapping malware.