Windows Activation was introduced in Windows XP to curb “casual” piracy. Although it undoubtedly curbed casual piracy, it also has caused confusion and frustration for consumers. After installing Windows XP or making certain hardware changes, you need to activate XP within a specified period (typically 30-60 days). As outlined below, there are a couple of methods for activating Windows – over the internet or via phone.
Before we try to activate, you can easily check the activation status in Windows XP by going to Start, Run and typing c:\windows\system32\oobe\msoobe.exe /a. If Windows is already activated, you will see confirmation that Windows is already activated, otherwise, it will give you the opportunity to activate.