Re: Anti-malware
Won't work. Ever.
Just like the DVD scrambling didn't work, and ditto for Blu-ray, PS3, HDCP, printer-ink cartridges, iOS, etc... People will break / leak / work around the keys.
There are already virii that tamper with the BIOS. There are already Virii that get around only signed software installs / drivers, etc.
What it will (possibly) do is make it harder for people to install any OS they want. Apple might be happy because machines won't run Mac OS X (without even more effort).
Windows / OEMs may change the keys from one generation of Windows to the next or between OEMs, etc. No putting new windows on old H/W; you have to buy new H/W. No putting that HP OEM Windows on a home-build or Dell box.
Maybe even stop people putting old Windows on new HW. Enforced upgrade cycles are good for everyone (except the customers).