There are several things you can do to improve the security of your computer. To learn how to help protect your PC, start by choosing an operating system below.
Select an operating system:
Not sure which Windows operating system you have?
1. Click Start, and then click Run.
2. In the box, type winver, and then click OK.
The version of Windows your computer is running appears in the window. If your operating system has a service pack installed, you will see the service pack listed:
Window showing Service Pack 2 listed as part of a PC’s operating system