I really appreciate your reply, but it didn't work, perhaps because I've not done it properly. I have both config.dos & config.sys and autoexec.dos & autoexec.dos. Just about everything is REM'd in all 4 files.

Here is my config.sys file:

REM [Header]
device=c:\realmode\oakcdrom.sys /D:mscd001
[common]
dos=high,umb
files=199
buffers=32,0
device=c:\windows\himem.sys /testmem ff
DEVICE=C:\WINDOWS\EMM386.EXE
REM -------------------
REM [Miscellaneous]
REM [SCSI Controllers]
REM [Display]
REM [Sound, MIDI, or Video Capture Card]
REM [Mouse]
REM -------------------

Here is my config.dos file:

REM [Header]
REM [CD-ROM Drive]
[common]
dos=high,umb
files=30
buffers=40
lastdrive=z
device=c:\realmode\himem.sys /testmem ff
REM -------------------
REM [Miscellaneous]
REM [SCSI Controllers]
REM [Display]
REM [Sound, MIDI, or Video Capture Card]
REM [Mouse]
REM -------------------

Here is my Autoexec.bat file:

SET BLASTER=A220 I7 D1 T2
REM [Header]
@ECHO OFF
REM [CD-ROM Drive]
REM [Miscellaneous]
REM [Display]
REM [Sound, MIDI, or Video Capture Card]
REM [Mouse]
SET SNDSCAPE=C:\WINDOWS

Here is my autoexec.dos file:

REM [Header]
@ECHO OFF
REM [Miscellaneous]
REM [Display]
REM [Sound, MIDI, or Video Capture Card]
REM [Mouse]

Here are the changes I made and the results:

1. Changed Config.sys line device=c:\realmode\oakcdrom.sys /D:mscd001 to devicehigh=c:\realmode\oakcdrom.sys /D:mscd001
2. Changed Config.sys line DEVICE=C:\WINDOWS\EMM386.EXE to DEVICE=C:\WINDOWS\EMM386.EXE RAM M3
3. No change to Autoexec.bat

RESULT: Windows wouldn't load and gave an error message to rebooted to SAFEMODE, so I restored the previous configuration.

4. Changed config.dos by inserting between dos-high,umb and files=30 these two lines: Device=C:\Windows\Himem.sys; and Device=C:\Windows\EMM386.exe RAM M3

5. No change to Autoexec.dos

RESULT: Changed conventional memory from 635k total, 274k used, 361k free to 632k total, 124k used, 508k free. Also changed largest executable program size from 317k to 508k, which is where I started before any changes.

NEXT QUESTIONS:

1. Which files do I change: config.sys/autoexec.bat or config.dos/autoexec.dos or does it make any difference?

2. What is RAM M3 and why did it cause reboot to SAFEMODE?

3. Why all the REM's instead of device= lines and/or can I substitute for them, i.e. lh mouse.com, etc?

4. What do I try next?

Thanks again