i have laptop Dell Inspiron 1420. i want to install windows7 ultimate OEM with SLP serial. i don't know how to mod bios version to update slic version. i do not want to risk my laptop. can i upgrade my slic and certificate version with daz loader 2.2.1. actually i guess i need slic and certificate version 2.2. the current version of my bios is A-10. help please.