The slic, cert & pid must match each other, but they do NOT need to match the manufacturer of the actual hardware. For example you can use an ASUS slic/cert/pid on an HP computer and Vista will activate fine. Or, in other words, just because you have a BenQ computer does not mean you have to use a BenQ slic/cert/pid. Don't get hung up on this when the problem is likely just that VistaLoader is not compatible with you computer. There are several people on this forum that have not had any success with soft mods such as VistaLoader. Interestingly, those people have been able to get Vista to activate with Paradox, but as we now know, it will not work with SP1. Keep in mind that all VistaLoader does is emulate the slic in software and then automate the installation of the cert & pid. In the long run you will still be far better off with a hard coded BIOS mod (slic inserted in BIOS) if your BIOS can be modded. I know there are some that can not. The only other option is to try other soft mods, for example Vista Boot from Gkend (just search for Gkend). Also, switching from one type of activation to another has caused problems for a lot of people, despite all of the tools (such as VOATK) for removing old mods. In that case, I believe the only way to proceed is with a clean re-install of Vista (with SP1 integrated) and then application of the appropriate mod.