I had excellent support from the Rollback folks. It turned out that my alleged problem was a loose nut on the keyboard (namely *doofus*). RB folks were fast & gentle & helpful. I find it rather disconcerting that one person's possibly a-typical experiences have gotten blown up into a bruhaha against an excellent product. I have tried all the others, & RB is the VERY first one that did the job for me & my office.