MSXML 4.0 Updates and 0x643 error code

I was having issues with this update and figured out what was wrong. The
permissions in my registry were causing the error. Even though all the
Msxml2.*.4.0 (* is wildcard for multiple entries) had the SYSTEM set with
full control in special permissions, I had to change all of them to FULL
CONTROL so that the update would work. I figured this out by reinstalling
full MSXML 4.0 package which gave me error message about each of those keys
and writing to them. Just thought I would let everyone know this.