Dell OptiPlex GX240 - Manual (Page 197)

200 Solving Problems
w
w
w
.d
e
ll
.co
m
|
s
u
p
p
o
rt
.d
e
ll.c
o
m
Input Errors
If a specific key or set of keys is pressed at the wrong time, a program may
give you unexpected results. See the documentation that came with your
application program to make sure the values or characters you are entering
are valid.
Error Messages
Error messages can be produced by an application program, the operating
system, or the computer. “
Messages and Codes ” discusses the error
messages that are generated by the computer. If you receive an error
message that is not listed in “
Messages and Codes ,” check your operating
system or application program documentation.
Device Drivers
Programs that use specialized subroutines called device drivers can also
cause problems with your computer. For example, a variation in the way the
data is sent to the monitor may require a special screen driver program that
expects a certain kind of video mode or monitor. In such cases, you may
have 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 this
problem.
Memory-Resident Programs
Many utilities and supplementary programs load either when the computer
boots or from an operating system prompt. These programs are designed to
stay resident in computer memory and thus always be available for use.
Because they remain in the computer's memory, memory conflicts and
errors can result when other programs require use of all or part of the
memory already occupied by these TSR programs.