Windows Update is the best way to keep your computer from becoming vulnerable to security risks.
Click here to go to Windows Update.
You can set your computer to automatically update without going to the Windows Update site.
If your using XP, Click Start and Control Panel
Click Automatic Updates
Click Automatic and choose a Time that best suits you and click OK
If your using Vista, Click Start and Control Panel
Click Security
Under Windows Update click Turn Automatic Updating On or Off
In this window you can choose a date and time that best suits you and click Ok
