I have just implemented Citrix over 6 cities nation wide usin a WAN - we have a few DOS, win95, win98 and winNT clients that all access the citrix servers. I have also had to re-build a few older machines that use the thin client software. My experience has been that in most cases it is pretty stable for all OS's except for the Win95 clients. I have had numerous occassions were I would just take of Win95 and put DOS on it. I don't have an exact reason as to why, but I have had really bad luck with 95 and thin client software.<br><br>Besides, I think the administration is a heck of alot easier using DOS becuase you do not have to worry about the user messing up something in the GUI interface - then making you work nights and weekends trying to find out what "file" they deleted that made everything stop working. <br><br>Most users can't even type there names at a DOS prompt - let alone delete a file! So I think it is a little bit safer and intimidating.<br><br>Maybe I have just been lucky, but my 98 and NT machines work great with the thin client software. Every once in a while I will get a BSOD in NT, but nothing that is tragic.<br><br>Hope this helps,<br><br>Pinkman<br>