bluescrubbie said:

I finally got around to trying this.

 

Win-XP could scroll explorer windows with the mouse-wheel, just by pointing at them, while Win-7 requires you focus the windows first... and I found the change to be really annoying, as my brain seems to be hard-wired to XP-mode.

 

This app seems to do the job and so far no weird stuff encountered, but it does appear to be slightly more expensive on CPU resources.