Help, I have a Dell computer ( if that makes a difference)I use yahoo, I am able to have up to 4 users. Using computer the other day, on craig list job listings, I got some kind of scam virus. It comes up as "System Tool". An anti-virus thing . It overrides my present security. I cant use my control panel. pop ups wanting me to download it and pay with credit card. It hasnt affected the other users on our pc. just me.

System Tool 2011 is a rogue anti-virus program. This program is installed on your computer, usually by Trojan virus.Once the program is installed, it will begin displaying fake security alerts, including advice about removing viruses. Upon execution, it will scan your computer and find fake threats, and then it urges you to purchase its software in order to protect your computer and/or remove the threats.It is a Malware.To remove the malware note down or take a print out of the below mentioned steps and follow the same; Step1:Boot your computer in “Safemode with Networking ” and log into the infected user account.Check the link below for instructions to boot in “SafeMode withNetworking”.http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/boot_failsafe.mspx?mfr=trueStep2:Once the computer is in Safemode with Networking open the Internet Explorer and go toWindows Live OneCare Safety Scanner web site(http://support.microsoft.com/kb/9680910.1. Proceed tohttp://onecare.live.com/site/en-us/default.htm (http://onecare.live.com/site/en-us/default.htm) then click on the blue button "Full Service Scan". 2. Click “Accept” on the Service Agreement.”3. Click "Install Now" button.NOTE: If installation is unsuccessful, click on theInformation Barbelow the address bar then click "Install ActiveX Control"4. When a Security Warning dialog box appears, asking you if you want to install the Windows Live Safety Center Component scanner, please click “Install”.5. Click on "Launch Scanner" button.6. A secondary window pane opens up titled Full Service Scan.NOTE: if a new windows pane does not appear thenTurn OFF the Popup Blocker temporarily & proceed. a. Click on “Next” to proceed with the complete scan. b. A progress bar will appear showing the status of the scanning tools while it’s downloading. c. A Status: Scanning your computer appears with - Virus and spyware scan - Registry Cleaner Scan - Disk Cleanup scan - Disk Fragmentation Scan - Open Ports scan - Computer information d. After the scan, click on “Next” on the summary page. e. Status Window: Fixing process will start. f. Summary page will appear. Click on “Next”. NOTE: Share information with Microsoft has a check by default. g. Uploading report with Microsoft will proceed. h. You will see a message "Scan is Done." Once its done, close all the application and restart the computer once and check if everything is working fine.For More Information and to manually remove check the following link:http://www.bleepingcomputer.com/virus-removal/remove-system-tool <If this post helps to resolve your issue, please click the "Propose as Answer" If you find it helpful , mark it as helpful by clicking on "Vote as Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster>Thameem

Thameen, Thank you very much. I will try it. see what happens.