In my humble opinion, CCleaner should not delete these Windows Update "Log" entries, with or without ticked boxes. These updates show up under Add/Remove Programs and should be treated as such - programs - that may be removed via Add/Remove or CCleaner's Tools/Uninstall; not by any other automatic process.
I have XP and CCleaner gets rid of all but two update entries under the "Windows XP - Software Updates" heading, but it does not touch update history under "Internet Explorer 8 - Software Updates" nor any of the .NET headings. Why delete some and not all? I say be consistent and not get rid of anything in Add/Remove unless running tasks specifically for that purpose.
BTW, I've been using CCleaner for years and have kept all my computers running well with this and a couple of other products. So, good job!
