If you are literally trying to activate Windows XP on a modern PC, stop. Windows XP has not received a security update since 2019 (POSReady patches). Connecting Windows XP to the internet today is a massive security risk.
The safest, smartest, and cheapest path is to install the official Windows 10 from Microsoft and simply ignore the activation watermark, or save up $15-$30 for a legitimate OEM key from a reputable reseller. Do not risk your digital life for a fake "activador." activador windows 10 ltsc xp
You cannot use a license key or activation tool from Windows XP to activate any version of Windows 10. The Technical Reality No Direct Upgrade Path: If you are literally trying to activate Windows