You invoke this file from a Windows 95 DOS window, then you shut down your P.C.
Not restart, but off. Then upon boot you either press <F8> and from the boot
menu select previous DOS version (item 7) or like my P.C. which is set to boot
to the menu and give 30 seconds to make a choice,  I also select item 7.

@echo off
hdir c:\msdos.*
echo !
ync ready to change to dos 6.22  (y or n) ?
if errorlevel=2 goto NADA
if errorlevel=1 goto NADA
if errorlevel=0 goto ZOOP
:ZOOP
attrib -s -h -r c:\msdos.*
del msdos.w40 > nul
ren msdos.sys msdos.w40
copy msdos.622 msdos.sys > nul
rem keep msdos.w40
attrib +s +h +r c:\msdos.*
:NADA
cls
hdir c:\command.*
echo !
ync how 'bout that 6.22 command.com  change'em (y or n) ?
if errorlevel=2 goto EGRESS
if errorlevel=1 goto EGRESS
if errorlevel=0 goto INGRESS
:INGRESS
del command.w40 > nul
ren command.com command.w40
copy command.622 command.com > nul
rem keep command.w40
rem copy c:\windows\command.com c:\command.com
:EGRESS
del c:\autoexec.bat > nul
copy c:\autoexec.622 c:\autoexec.bat > nul
copy c:\config.622 c:\config.sys > nul
cls
hdir c:\msdos.*
pause
hdir c:\command.*
echo !
echo !  ready to boot into dos 6.22
echo !
pause

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