After repairing Windows XP or after replacing a motherboard, you might receive this error before logging in "This copy of windows must be activated with microsoft before you can log on."

  • Download this patch which works for Windows XP Home and Prof.
  • Reboot to Safe Mode.
  • Open the downloaded file and double-click AntiWPA3.cmd
  • Click Yes when it prompt.
  • That should be it.
  • Restart the computer and you should be able to login now.
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For the sake of XP installation continuity, we can use the default product key inside the XP CD.

You can find the product key by browsing:

<cd-rom drive letter>\i386\unattend.txt

At the bottom of the file, you will find the product key. One of the common product key is



After finishing the XP installation, you need to activate Windows and use the original product key of the computer.

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NOTE: Performing procedures below may corrupt your motherboard's BIOS if not done properly.  I don’t take any responsibility for anything that results from following these instructions (good or bad). You’re following these instructions at your own risk.

Let's start - this instruction is originally from HP Forum created by Justin Maslack. Download the Crisis Recovery file here.

I had to apply these instructions as I have Windows XP installed in my HP Pavilion dv2000 (dv2533) laptop. After 1.5 years, my motherboard died, I had to replace it and re-downgrade BIOS to version F.13. The seller where I bought the motherboard (PCSuperFreak on eBay) flashed the BIOS with the latest version (version F.2E at that time).

When I downloaded BIOS version F.13 and tried to install it, it won't allow it unless I have Vista installed. So, I need to convert the BIOS file to a bootable floppy version using Phoenix Crisis Recovery. I will not tackle how to create a Crisis Recovery Disk in detail. I attached the file compiled by Justin Maslack which can be downloaded here.

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