Vista 5259/5270 Registry Problems

When I try to install AVG Free anti-virus on Vista 5259 or 5270 (from Administrator), the install gets "access denied" trying to write registry keys. When I install the P4P800 Soundmax app the install fails when "Oleaut32.dll" gets 0x8007005 (access denied) trying to self register. I fixed the AVG problem by giving Admin write-access to the keys needed. The Soundmax problem also seems to be caused by missing write-access permissions in registry keys.

I have recorded registry changes with Regmon while executing "regsvr32 Oleaut32" and I am able to find and fix the key missing Admin write permission. But then I run it again, fix another key--over and over again. So there are apparently dozens of keys with the same problem or perhaps new keys are being created without permissions.

I have tried giving Admin full control of all sub keys below a main key, but I can't get it to work right. I still have to manually give write access to Admin on many lower level keys. Ideally I would like to give Admin write access to all keys, either at the root key level (HKCR in this case) or with a script that would go through all the keys in the registry. Is this possible? I think this might fix a variety of problems in the 5259/5270 releases.