This copy of Windows must be activated before you can log on

If you have read my previous post about "How to Activate Windows XP Without a Product Key" I'm pretty sure that you will need to read this also. There is a possibility that you will receive a error message which says "This copy of Windows must be activated before you can log on" after 30 days. Since you have already activated the windows it will not allow you to go to the desktop. So what do you do to log back in ?

How to Activate Windows XP Without a Product Key

Did you just install, or reinstall Windows XP on your Computer, and when you are trying to activate the software, Microsoft says that your product key is not genuine, the product is no longer available for retail sale, or the number of activations have been exceeded? It may ask you to call Microsoft to get a new product key, or purchase windows 7.