Permissions, Ownership, & Access Control Bugs with 64bit RC

Seemingly exactly the same problem as documented here, except I am experiencing it on the 64 bit version:

Fix Incorrect Access Control Lists on the Windows 7 RC Root - Just for the 32-bit Ultimate version in English - Softpedia

The problem is that I am denied access to the local disk C:\ in which Windows, and everything else, is installed (i have no other partitions or hard disks). I have tried safe mode and changing ownership remotely, and even booting up through the CD and trying to do a system restore, but each one returns the message "Access Denied". I can access the internet but many programs are denied write access and therefore cannot run.

I've found some old threads with the same problems, but none have lead to any solid fixes except for a format and reinstall, and as I've been using this RC for sometime now, I want to exhaust all other options before having to start from scratch. It seems like an identical problem as shown in the article above of which MS released a hotfix.

Any new insights would be greatly appreciated!

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