|Sorry for the delay.|
Are you able to get into Windows, but, if you do, the malware takes over and does not let you do anything?
Is the name of the malware Vista Antimalware, or Vista Antimalware 2011?
If so, you can try the following:
Note: If the infection does not let you download files to the infected computer, or you have no Internet connection, download the files/programs requested below to a clean computer and then transfer them to the Desktop of infected computer. You can use a USB flash drive, or other removable media (CD/DVD, external drive).
Please download iExplore.exe, which is a renamed copy of RKill:
[If the file does not download, paste the following, >without the brackets<, in the address bar of your browser:
Save the file to the Desktop, and double-click on it.
Ignore any messages, and allow the file to run until the command window closes.
If you have problems running RKill, download any of the other renamed versions of RKill from its download page.
Without a reboot, download Malwarebytes’ Anti-Malware (black button with green and white icon) Save to the Desktop:
Double-click mbam-setup.exe and follow the prompts to install the program.
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.<<
Retired - Doin' Dis, Dat, and slapping malware.