With the help of Adobe's "install team" and a 1½ hour intensive phone consult (that required renaming and removing some files, then literally reinstalling the installer), I was able to upgrade to PS CS6 (non-CC) and update Camera Raw to open my Canon 6D files. Yay! (Win XP SP3 32-bit). My Camera Raw version is now v8.3 and it opens Canon 6D files in Windows XP SP3.
In looking ahead, I also bought components for a new PC build that is i5-4690K, 16GB 1866 ram, RAID-1 for boot and another RAID-1 for data. I have a dedicated SSD for PS scratch and Windows pagefile. It is running and I am loading software. No smoke yet
Looking forward to a big year, and getting retooled!
Wishing you great light in the New Year!
Paul Chaplo