Press the Windows key (at the bottom of the keyboard, looks like four squares) and R key at the same time to open the Run dialog box. Type in “winver.” ... A window should open called About Windows that tells you which operating system you are using. This computer is using Windows 10.

How do I know if I have operating system?

Click the Start or Windows button (usually in the lower-left corner of your computer screen). Click Settings. Click About (usually in the lower left of the screen). The resulting screen shows the edition of Windows.

Does every computer have an operating system?

Yes. But you have a lot of work to do. Without an operating system using and enforcing a standard, systematic approach to running the computer, you're put in the position of writing code (or programs) that must tell the computer exactly what to do.