> I've a question for users of Leica's TCS-4D confocal. We're interested in > upgrading the operation system on the PC portion of this microscope from > Win 3.1 to Win 95 I have indeed done this with a great deal of success. Admittedly I did forget the tecvision suplemental software installation which caused a few problems! The windows didn't update themselves when changed! Having been through Win95, to WinNT 3.51 and now on WinNT 4.0, I would hate to go back to Win3.x! Have to say WinNT4.0 is proving highly rewarding in the performance of the scanware software .... scanware even shuts down smoothly when you ask it to now! If you can afford it, go straight to NT. Leica wouldn't recognize the pc now, having been upgraded to a 166MHz pentium with 32 Megs RAM ..... all went smoothly and scanware is flying! Hope this helps Andy Andy Hubbard. Confocal Microscopy Technician, CMHT., Hodgkin Building, Leicester University. Tel: 0116 2525625, email: [log in to unmask]