Hello. I installed Windows XP VOL License, and it's activated. I modded my BIOS with SLP 1.0 to activate OEM license (I use Acer laptop). So, I must deactivate my windows by the following way: I only do from step 1 to step 5 to deactivate. After that, I use tool "VLK and OEMBIOS changer" by 911medic but after restart, OS say that it's not activated. I don't understand where I do a mistake. Now, I want to activate OEM license. Please help me. Thanks.