Set up your Microsoft account on your devices (specifically my decrepit but beloved 2007 Windows HP Pavilion Slimline)

Hello MS community,
Quick question (I hope).  I bought two Pavilion detachables last year and signed up for the Microsoft account to connect both of them.

So I decided to try it with my HP Slimline with Windows 2007.  When I log into my Microsoft account, under Devices, there is an option that states, "Set up your Microsoft account on your devices" with the stated promise "Whatever devices you have, getting your Microsoft account started is simple - setup takes a few easy steps."

1. Select the device type you want to set up your account on: I choose PC
2. Select the operating system (OS) the device runs on:  I choose Windows
3. Make sure your device is running the latest version of Windows:  I checked and it shows Windows 7 Premium
4. Sign in with your Microsoft account.  Select the Start button, then select Settings > Accounts > Email & app accounts.  Under Accounts used by other apps, select Add a Microsoft account.  

Follow the prompts to add your Microsoft account. You may need to verify your identity by entering a confirmation code.

Your local account will switch to your Microsoft account. The next time you sign in to Windows, use your Microsoft account name and password. Your apps and files will not be affected.

I don't get step 4.  Is it because I have Windows 7, not Windows 10?  I go to Start and type in Settings - a bajillion choices shows up.

Am I missing the obvious?  Or am I right about the Windows 7 vs. Windows 10 difference?

Thank you in advance for any feedback!