Issue
How do I fix Illegal Operations?
Cause
Illegal
Operations can be caused by several different factors. Below is a
listing of the more commonly known reasons for getting an Illegal
Operations.
- TSR's or Third-party programs causing memory conflicts or other conflicts with the program or programs attempting to be run.
- Data not being read properly from source. Running a program or game with a dirty CD can cause the CD to be read improperly causing Illegal Operations. Floppy diskettes, which may contain errors can cause illegal operations.
- Installing a program or game on a hard drive that has errors or is highly fragmented.
- Corrupt files.
- Memory managers.
- Bad, incorrect or not the latest video drivers.
- Computer Virus.
- Added hardware
- Error in program coding
- Corruption or problem within Windows.
- Bad Memory, invalid bits or physically bad memory.
Solution
TSR's or Third-party programs
TSR's
or Third-party programs running in the background are one of the more
commonly found reasons for Illegal Operations. If you are receiving an
Illegal Operation when attempting to run a game or program it is
recommend that you temporarily remove or disable programs running and
TSR's running in the background, ensuring that these programs are not
causing your issues.
If, after removing these programs, you run the program
or game and no longer receive the Illegal Operations, it is recommend
that you reboot the computer and disable or End Task each program or TSR
one at a time to attempt to determine
what program is causing the Illegal Operation.
Data not being read properly from source
When
running a program or game from a CD you receive an Illegal Operation,
verify that the CD is clean. Additional information on how to clean a CD
or CD-ROM drive can be found on our Cleaning Page.
If
you are running a game from a floppy diskette or other floppy media
such as a zip diskette or LS120, verify that the diskette does not have
physical errors with it by running a
ScanDisk or a disk drive utility included with the drive.
Installing a program or game on a hard drive that has errors or is highly fragmented
When
installing a program or game onto a hard drive it is recommended if you
receive errors after installing that program or game that you uninstall
that program or game, run a
ScanDisk, then a defrag, and finally install the program or game again.
If errors exist on the hard drive, they will cause the program or game to run improperly and can cause Illegal Operations.
Corrupt files
Corrupt,
bad or missing files can cause Illegal Operations. It is recommended
that you uninstall
or reinstall the program causing the Illegal Operation to verify that
any corrupt, bad or missing files are replaced or repaired during the
reinstallation.
Memory managers
If
you are running a memory manager that is used to obtain more memory or
handle the computer memory in replace of Windows, it is recommended you
temporarily disable or uninstall this program to verify it is not the
memory manager causing the Illegal Operations.
Bad, incorrect or not the latest video drivers
Bad,
incorrect or not the latest video drivers may cause Illegal Operations
when performing such tasks as moving the mouse or dragging data from one
source to another as high demands are placed onto the video card.
Decrease the video settings to at least 800 x 600, 256 colors to verify
if the program or game being run is having errors because of the
current video settings.
- How to set the resolution in Microsoft Windows?
- How to set the resolution or change the resolution/adapter in Windows 3.x.
If, after attempting to adjust the video settings, you
still encounter the same issue, verify the computer is utilizing the
latest video card drivers by visiting our
computer video drivers section.
Computer Virus
Because
computer viruses are loaded into memory and can change the data of
program files when infecting a computer, ensure that a virus protection
utility is installed on the computer and that you have the latest Virus
Definition.
Additional information about computer Viruses can be found at our Virus page.
Added hardware
If
added hardware has been recently installed onto the computer it is
likely that either the hardware is conflicting with other hardware
devices on the computer or that the drivers used to install that
hardware is causing issues with other hardware or software installed on
the computer.
If added hardware has recently been
added to the computer, it is recommended that you temporarily remove
that added hardware and the software associated with it to ensure it is
not causing your issues.
Error in program coding
If
you are receiving Illegal Operations only when running a particular
program, verify that the program is compatible with the Version of
Windows you are running and ensure no available patches or software are
available that may fix errors made during the development stages.
Corruption or problem within Windows
Because
Windows controls the memory operations as well as the file structure
and association, it is possible for Windows or files associated with
Windows to become corrupted, causing Illegal Operations or other errors.
It is recommended you reinstall Windows if you are experiencing Illegal
Operations in Windows or more than one program trying to be run on the
computer.
Bad Memory, invalid bits or physically bad memory
It
is possible that bad memory can cause Illegal Operations. If you have
recently added memory to the computer, it is recommended that it first
be removed to verify that you are not experiencing conflicts with the
recently installed memory.
If no memory has been recently added to the computer and you have tried all the above recommendations
test your computer memory.
Additional information
- See our Illegal Operation definition for further information on this term and visual example of the error.
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