If you like working with commands in the command prompt window, this tip is for you. The F7 key allows you to recall commands you issued earlier in the command prompt window. To see how it works, try this out:

1. Click Start and click the Run command.
2. In the Run dialog box, type cmd in the Open text box and click OK.
3. In the command prompt window, type ping localhost and press [ENTER]. This will ping your own network card to confirm that it's functioning properly.
4. At the command prompt, type nslookup www.microsoft.com and press [ENTER]. If you're connected to the Internet, you will see a list of IP address that match www.microsoft.com.
5. At the command prompt, type ipconfig /all and press [ENTER]. You see information about your network connections.
6. Press the F7 key at the top of your keyboard. You'll see a list of commands you recently issued at the command prompt. If you want to run a command again, just use the up or down arrow key to highlight the command and press [ENTER]. The command runs again.