finger trouble
n.— «We normally don’t have service calls as the hardware is very reliable. In fact, we have never made a hardware repair. Problems come from what is known as finger trouble, where unskilled people fiddle with the computer and somehow lose the settings.» —“Bleeping Device Easily Worth Its Weight in Gold” by Abdul Milazi Business Day (Johannesburg, South Africa) July 2, 2007. (source: Double-Tongued Dictionary)