Running Safe Mode / System Properties/ Performance. The following is displayed:

>Compatibility- mode paging reduces overall system performance.
>Drive A is using MS-DOS compatibility mode file system.
>Drive C is using MS-DOS compatibility mode file system

"Compatibility mode paging reduces overall system performance.
Windows was unable to identify a real-mode driver or memory-resident program loaded in your Config.sys or Autoexec.bat file. You will see another message that lists the name of the driver or program causing the problem.
Because Windows could not identify the driver or program, it has switched to MS-DOS compatibility mode to ensure the program will run. However, this decreases overall performance. To improve performance, remove the program or driver causing the problem, or contact its manufacturer for an upgraded version."

Q: Is this a problem with my computer that I need to address or is it normal? I'm concerned about the " However, this decreases overall performance." It states to remove the program or driver causing the problem. Where would I look? Or is it not cause for concern?
Thanks for any insight.
Carson...(total novice on this one)