I added a utility to my system which means you can "Take Ownership" of files or folders. The utility seems to be here now although I forgot exactly where I got it. How To: Take Ownership Of A Folder/File In Windows 7
Once installed all I did was to use the right click "Take Ownership" on the main CBuilder folder in "Program Files". Then it runs correctly.
I added a hard disc drive to my PC wil lots of data from an old XP machine. I could see all the files but could not open them without jumping through admin hoops. Using this utility on the whole drive gave me full unrestricted access.
I hope it works for you.