In previous times with Win98, I used to happily use two different Pico scopes on the same PC without problems by installing them in different directories. XP and/or your R.24 doesn't seem to allow that. How do I do it? I am trying to use a 3224 scope and an ADC11 logger (at different times!). I seem to have to install each one each time which is a pain (understatement).