There are several pieces of information that are helpful to keep on hand if you are making changes or need assistance with your computer.

Knowing your computer’s operating system is important so you’re able to identify what software is supported, select the correct software version to install, and complete the latest security updates. Find your operating system on Windows or Mac.

To address network connectivity issues, you will often need to find your computer’s physical address or master access control (MAC) address. The MAC address is your computer’s unique hardware number in the network. Look up your MAC address.