IT must never slow down users.
Rule number 1. IT is there to serve the users not the users to serve IT.
Invest in IT and you don't have these issues. IT is not a money making venture but putting money in it saves money for your staff, makes for more time that is billable and it doesn't take a lot of the right billable time to pay for the investment. An IT guy is worth between 30 seconds and 2 minutes worth of time per hour for our highest charging users. They are overhead but investing in that overhead and makes the billable guys able to do more. For our best guys we can afford 1 IT guy for each of them, like private assistants and other perks. But then we get it and most don't. Most shops are cutting IT when they should be investing and forcing users to do IT when they shouldn't. If you have any of the symptoms as described in this post your problem isn't users but that you need to invest more in IT.