<<1. Microsoft's PageDefrag won't open/run (attached Defrag log text file).>>
I've not ever tried this tool, but someone will respond who has.
<<2. CCleaner returns list of temp files related to IE5 (IE was auto-updated to 7).>>
Sorry, I've never used CCleaner. Are you talking files...or are you referring to registry entries? What is the path given for these "files"?
<<3. Is Microsoft .NET version 3.5 necessary really?>>
MS.NET is a required application which facilitates the running of certain programs and games (as I understand it). If you have a game or program which prompted you to install MS.NET...then it's necessary if you want that program/game to run smoothly. If you have no game or program which prompted you to install MS.NET...then I would say that you could remove it (if you so desire).
I have it installed because my video drivers require it and nLite requires it. If neither required it, I would not have it installed on my systems.
<<4. Unknown programs were found only in Registry (exported keys to folder).>>
Again, I don't use CCleaner, so I have no idea of what an "unknown program" might be. I've never seen any notification of such and I suspect that CCleaner provides you with its definition of such might be.
<<THANK YOU! to BC's administrators & moderators for all your help. After reading many posts here, I'm very impressed with the expertise & dedication given to people who come here for help. The world of eCommerce owes you folks a lot. You are the BEST!
You probably ought to extend application of your thanks...to all the visitors and regulars who also contribute mightily to the suggestions, advice, and assistance provided by this forum (just my opinion). If you look over many of the posts here, I think that you will see that many contributions are made by those who form the larger group...as well as the BC Admins & Mods.
Hang on...someone who does use CCleaner will come along to attempt to answer those questions which seem to remain unaddressed
Edit: Have you tried updating Jave at the Sun website? Updates appear routinely for Java, often because vulnerabilities have been discovered in older versions.http://www.java.com/en/download/manual.jsp