I had XP Pro VLK installed on my Dell PC. I used the VLK to OEMBIOS changer to install the Dell SLIC and and restarted my machine. When I try to install Microsoft Security Essentials it says my computer did not pass validation and gives me a link to activate. I click on the link and it says activation failed. Shouldn't my machine be able to pass this validation test now that I changed to OEMBIOS? How can I get passed this and install MSE?