In the "for what it's worth category", I am somewhat embarrassed to admit that I am poking along in Win 95A at a 50 mhz bus speed with a Pentium chip underclocked at 150mhz. But then it usually doesn't crash.
But I have experienced conflicts with Outlook Express in the past, so I use "big" Outlook 98. I just clicked on Outlook Express to see if anything untoward happened. No immediate crashes, with or without UFT. But I did notice that The browser stayed on, wheras I have Outlook 98 set to disconnect after getting mail.