Computer manufacturers and retailers tell us that the complexity involved in connecting the various components of personal computers is not a widespread obstacle to their use, but this is wrong  Customers who install accessories to their personal computers have to take full responsibility for the setting of jumpers and switches to satisfy mysterious specifications
Many accessories require extra software that can cause other accessories to stop working; adding a modem, for instance, may disable a printer
Computer manufacturers rarely take into account ease of installation when they are designing programs or accessories.