First off. I bought a Dell Latitude D520 off Ebay for chump change. My old Acer Aspire 3100 has broken down from light use to the point it is just about unusable and the Dell is an upgrade in specs without breaking the bank.. Now, I have not done anything with Dell's in a few years. I think the latest Dell I have actually done anything to was a GX-280. However I do remember that any Dell would activate any version of windows up to Win XP because the bios provided the needed information.. So with the D520 having XP Pro installed, I thought I could install Win 7 Pro with a Dell OEM install disc ( Have a disc coming too ), that's when I ran across SLIC 2.0/2.1 and how it authenticates the machine to accept a cert and key, so it made sense.. After that, I did manage to find a D520 bios with SLIC 2.1. BUT, I'm a DIY kind of person, and I found the phoenixtool from here, plugged in the Dell Bios, selected, Dell SLIC 2.1 left out the RW file because I read Dells don't need it, and ran it as dynamic and it wrote the bios. I verified and compared the orig to the new in the little box, and it looked legit. Just rewrote the SLIC table from 2.0 to 2.1.. I downloaded the bios that I found online and checked that, and it looked almost the same as the one I wrote.. Now I really want to run my bios if it is safe to do, rather than someone elses. I read that the Phoenix tool will corrupt a bios, and to only use it for test runs and to manually write the bios. also read that the bios should be flashed using Phlash, but the Dell bios is an EXE.. Is my Phoenixtool edited bios safe to use, and how do I flash the bios from dos on a dell? I also have a question about adding SLIC 2.1 to an Asus M378A-CM mobo with Dell SLP and SLIC 2.1, so that I can use the oem dell disc on it with out issue also. I know I could use the Asus cert and the right key to make it work too.. I used the AMI tool and SSV3 with std settings and it came up right as successful, but did change a bunch to Dell beyond the SLIC 2.1 tables, and I'm especially worried about that computer because it's not mine ( altho I donated all major parts to the build. It's my old box ). If I brick it, I'll never hear the end of it.. I know that Asus had a model of desktop that ran that mobo and Win 7 with an SLIC 2.1 table but I'm not sure which model... Is what I want to do with the Asus mobo safe? I flashed the bios to the most current when I gave it away.