My computer recently came with a pop up that said it was from the FBI that they had locked my computer. It said I had to go buy a card and enter some numbers for it to be unlocked. Can anyhone help me

I turned on my computer and a site popped up and said it was from the FBI. It said that I had to go buy some card and enter some numbers for it to be unlocked. They said they had detected mp3, videos, and other things being downloaded. This is not possible because it is in my community room at work and no one has been in there.  Is this a virus and what can I do.

This is a variant of the Metropolitan Police Ransomeware Scam that has been prevalent in the U.K and is spreading to other geographic locations. If Microsoft Security Essentials will not remove it (we assume you're using MSE since you're in the MSE Forum) why don't you try the advice in the following link compliments of Brian- who is one of the Answers Forum users:

http://www.selectrealsecurity.com/remove-ransomware

If you need assistance from MS Support regarding malware removal please see the following:

Start here - https://support.microsoftsecurityessentials.com/  and select the link that says - I think my computer is infected. Options will vary by region, but phone support leads you to Microsoft Answer Desk (http://www.answerdesk.com/)in the US at this time. After an initial free consultation, a fee may be charged for assistance, based on the details of the case.

In other regions not served by the link above, go here:   http://Support.microsoft.com/security and go to the “assisted support” or contact us menu.   For international information, see your local subsidiary Support site.

If you'd like some free options, consider this web site - http://www.bleepingcomputer.com -  which contains details for many of the common infections, often immediately after they began to appear in the wild, and instructions are provided for how to remove the infections using their malware removal guides. They also have forums where you can seek help from people who specialize in malware removal.

Other free malware-removal forum options include:

http://discussions.virtualdr.com/forumdisplay.php?f=71

 http://www.dslreports.com/forum/cleanup

 http://www.daniweb.com/hardware-and-software/microsoft-windows/viruses-spyware-and-other-nasties/64

 http://www.geekstogo.com/forum/forum/118-security/

 I hope this helps….good luck!