go on Microsoft Download center website, or click “Start” on the right corn of you monitor, then click “Control Panel
Click System, and then click the Automatic Updates tab.
Click Performance and Maintenance, click System, and then click the Automatic Updates tab.
Click the option that you want. Make sure Automatic Updates is not turn
If you currently use antivirus software, visit the manufacturer's Web site, update it, and then perform a thorough scan of your system. If you don't currently use antivirus software, subscribe to a service and scan your system immediately.
Download, install, and run the Malicious Software Removal Tool (for Microsoft Windows XP or Windows 2000 users). Note that this tool does not prevent viruses from infecting your system; it only helps to remove existing viruses.