If you install a fresh copy of Windows XP in 2022, you will probably notice that the automatic activation process fails. This is because Microsoft retired this service, after all the OS is more than 20 years old and it is not able to connect to most SSL sites anymore.
But do you know that Windows XP can still be activated? For that, start the activation wizard and try to activate Windows online: it will fail.
Then select “Activate by Phone” and follow the guided messages, you will be asked for a series of numbers like the ones displayed on the screenshot below.
Once you get you activation code, bingo, it works!