If you click on (?) in the browser tool bar (any).Then click on about internet exployer it will tell you which browser you are using. Either 64bit or cypher strength 256-bit, which is the 32bit version.
The only difference twixt the two seems to be that 64bit doesn't accept all add-on's. for example I like iespell-to check my spelling. It downloaded OK in the 32bit, but not in the 64bit. Hence I write all in the 32bit version.
I hope this helps.
I had Cyberlink installed on my 64bit ultimate. It worked OK but I didn't like it-took it out.