It was the user interface that caused the woes, not the OS beneath the hood. An office environment is Microsoft's bread and butter for the windows desktop OS. This new interface was completely different than all the windows before and very unintuitive. For the computer savvy this was a temporary, relatively minor annoyance. But for the typical office worker (such as a secretary) who isn't computer savvy it was a nightmare - everything was changed and they couldn't figure out how to work the thing. They are used to the way its always been and they pretty much spaz out when confronted with that magnitude of change.
Gee, I guess all the businesses that employ those workers should just allow then a few weeks of playing around time to "figure out how to work the thing" at the business owner's expense. No problem for you, Mr. "computer savvy", or for Microsoft, eh??