In order to get the most out of Windows XP, you’ll need to activate it using your Windows XP product key. If you have an internet connection or dial-up modem, you can get activated with just a few clicks. You can also call Microsoft and get an activation code if you don’t have access to the internet.

What happens if you don’t activate Windows XP?

Windows Vista’s penalty for failure to activate is much harsher that of Windows XP. After a grace period of 30 days, Vista enters “Reduced Functionality Mode” or RFM. Under RFM, you can’t play any Windows games. You will also lose access to premium features such as Aero Glass, ReadyBoost or and BitLocker.

Can Windows XP be upgraded to Windows 7?

Windows 7 will not automatically upgrade from XP, which means that you have to uninstall Windows XP before you can install Windows 7. And yes, that’s just about as scary as it sounds. Moving to Windows 7 from Windows XP is a one-way street — you can’t return to your old version of Windows.