Hello mirving, sorry to hear about your trouble in regards to the FBI virus.
A few quick suggestions would be to use other tips described on this page, such as denying flash, or logging into your computer system via another user account.
Deny Flash:
1. To disable (deny) flash visit:http://www.macromedia.com/support/documentation/en/flashplayer/help/help09.html
2. Select the “Deny” radio option
3. Proceed to a removal option such as scanning and removing malware via Anti-Malware software, system restore, etc.