Knowledgebase

General Protection Fault in module MMSYSTEM.DLL

  • Select Start, then Run.
  • Type: SYSEDIT.
  • In the System Configuration Editor, select Window, then C:\WINDOWS\SYSTEM.INI.
  • In the [boot] section, see if the DRIVERS= line is missing or commented out with a semicolon (;) in front of it.
    The line usually reads DRIVERS=MMSYSTEM.DLL.
  • Add the line to the file or restore the line by removing the semicolon (;)
  • NOTE: There may be other drivers loading on this line, so do not to delete them. Make sure that the portion below of the DRIVERS= line reads exactly: DRIVERS=MMSYSTEM.DLL
  • Select File, then Save.
  • Select File, then Exit.
  • Restart Windows.