Basic Microsoft DOS troubleshooting

Below are some reasons why a user may follow the steps in this document.
Unknown or undocumented problem with computer running Microsoft DOS.
Performance issues with the computer, for example, the computer running slowly.
Users who wish to run maintenance on the computer or potentially speed up the computer.
Users looking for steps to help resolve an issue or that may help in locating the cause of an issue.
Solutions:
Error messages encountered during boot
1. Ensure that your computer BIOS settings are correctly configured to the hardware that is installed in your computer. Improper settings in the BIOS may cause various types of errors when first booting an IBM compatible computer. These errors often occur as the computer is first booting and may stop the load process of the computer.
2. Errors that are encountered during boot are commonly due to a misconfiguration with your autoexec.bat or config.sys. We recommend that you edit your autoexec.bat and/or config.sys and look for any abnormalities.
Other error messages
If you are experiencing other error messages it is likely these errors are being caused by the software program you are running and/or a hardware device you are attempting to utilize. It is recommended you see the basic troubleshooting section for your hardware device or software program.
Computer running slowly
1. Make sure your autoexec.bat and config.sys are optimized. Changing the way programs load into memory, removing lines that are not necessary, and changing the order of lines in your config.sys can all help with improving the speed of your computer.
2. Make sure your computer has at least 50MB of free hard disk drive space. If your computer has less than 50MB free, it may cause the computer to operate more slowly.
3. Run Microsoft Scandisk and Defrag on the computer.
4. From the MS-DOS prompt C:\> type chkdsk /f, if this gives you a bad command or file name, type cd\dos and press enter to get into the DOS prompt and try it again.
5. Delete all the temporary files and any scandisk error files. From the MS- DOS prompt C:\> type del *.tmp to delete all temporary files, also type del *.chk. Once the files have been deleted, type cd\dos to get into the DOS directory and delete the *.tmp and *.chk files like was done earlier.
6. Ensure your computer has the latest drivers for the hardware devices installed in your computer.
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