I should have met all the specifications needed to install said Bios, however after installing it, I am stuck in a loop where I cannot reach the Login screen.
It would automatically crash and restart, then reach the Startup Repair section, where it can not repair.
I created a system restore point prior to installing the bios, but i also recently learned that you cannot undo a Bios upgrade.
Sounds like more of a software issue.
Firstly, you listed that it won't let you to the login screen. I'm assuming that means that your system makes it past POST? You might try checkdisk, which could be challenging for you at this point? Normally I'd run it from a physical environment with a command prompt snap-in but I can't really think of one that'll have that. Also, if you're able to get that I'd run a system file check.
You're correct in the assessment that you can't really undo a BIOS update easily. However, it looks like the update took and you're just kindof stuck with a borked Vista install.
You listed that you created a restore point. That's awesome! If you'd like to revert that that point you can try this on a working pc:http://www.howtogeek...system-restore/
(Skip to the part that lists in the event of boot failure)