Found this in Tom's hardware .....
I ended up having to download Asus Suite 3, and I unlike the other updaters I was using, it actually worked.
Not to dodge the situation, but... Very astonishment, much irritation.
Anyway, the bios appears to be properly updated now. But I haven't done much delving or research into it, other than verifying that it now has the most recent update.
The error, at least the bios error, that I was previously getting, I am no longer getting. Since I took the time to reinstall windows again, this time I adjusted windows update settings and I will be attempting to hold back the downloading of the security update that caused the problem in the first place. Fortunately, one of the gentleman whose videos I watched identified the security update by name specifically. So that, and all of this, should be a snap.
Man, I have to tell you what, I have never had so much trouble with a PC before. I don't know if it's just bad luck or what, but I am never building an AMD PC again.
You aren't the only one to have had this problem but this was the only resolution that I can find - the only other option would be to email ASUS Customer Support
And just an FYI for you - I found this within a minute of searching on GOOGLE!