Well, even when "idle", your computer is quietly running about two dozen processes.  Still, it does appear that P8 is the one generating the gobs of IE5 and XML files.
      I've also noticed yesterday that on at least one of my machines (TinkerBell) I can't save a new material (mt5 or mc6);  the + button isn't there!  It was there on Pixie the other day.  I'll have to see if it comes/goes on the same machine, or if it seems to be XP vs Vista, or what.

     In any case, I'm not inclined to uninstall Poser 8;  I simply am making note of perceived issues, and I'll hope that SM gets them fixed.  The advances offered in P8 are worth the effort, to me.  I'm a hot rodder, so I have a high tolerance for dealing with teething troubles on new/adapted equipment.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5