Оффтопик, конечно, но, вероятно у Вас установлен Windows XP и там, естественно, включен "System Restore", куда вирус и записался. Надо отключить "System Restore", перезагрузить компьютер и прогнать антивирус. Проделать эту процедуру пару раз и опять включить "Restore"
To turn off System Restore, follow these steps:
* Click Start, then right-click My Computer, and then click Properties.
* Click the System Restore tab.
* Click to select the Turn off System Restore check box (or the Turn off System Restore on all drives check box), and then click OK.
* Click Yes when you receive the prompt to the turn off System Restore.
Turn On System Restore
* To turn on System Restore, follow these steps:
* Click Start, then right-click My Computer, and then click Properties.
* Click the System Restore tab.
* Click to clear the Turn off System Restore check box (or the Turn off System Restore on all drives check box), and then click OK.