208 Solving Problemsw w w . d e l l . c o m | s u p p o r t . d e l l . c o m Input ErrorsIf a specific key or set of keys is pressed at the wrong time, a program maygive you unexpected results. See the documentation that came with yourapplication program to make sure the values or characters you are enteringare valid.Error MessagesError messages can be produced by an application program, the operatingsystem, or the computer. “Messages and Codes” discusses the errormessages that are generated by the computer. If you receive an errormessage that is not listed in “Messages and Codes,” check your operatingsystem or application program documentation.Device DriversPrograms that use specialized subroutines called device drivers can alsocause problems with your computer. For example, a variation in the way thedata is sent to the monitor may require a special screen driver program thatexpects a certain kind of video mode or monitor. In such cases, you mayhave to develop an alternative method of running that particular program—the creation of a boot file made especially for that program, for example.Call the support service for the software you are using to help you with thisproblem.Memory-Resident ProgramsMany utilities and supplementary programs load either when the computerboots or from an operating system prompt. These programs are designed tostay resident in computer memory and thus always be available for use.Because they remain in the computer's memory, memory conflicts anderrors can result when other programs require use of all or part of thememory already occupied by these TSR programs.
