copy c:\dos\attrib.exe c:\atrid.exe 
copy c:\command.com c:\comd.com 

set comspec=c:\comd.com
ren COMMAND.COM command.dos
ren CONFIG.SYS CONFIG.dos
ren AUTOEXEC.BAT AUTOEXEC.dos 
ren COMMAND.W40 COMMAND.COM
ren CONFIG.W40 CONFIG.SYS
ren AUTOEXEC.W40 AUTOEXEC.BAT 
atrid -r -s -h IO.SYS
atrid -r -s -h MSDOS.SYS
atrid -r -s -h MSDOS.W40
atrid -r -s -h WINBOOT.SYS 
ren IO.SYS IO.dos
ren MSDOS.SYS MSDOS.dos
ren MSDOS.W40 MSDOS.SYS
ren WINBOOT.SYS IO.sys 
atrid +r +s +h IO.SYS
atrid +r +s +h MSDOS.SYS
atrid +r +s +h IO.dos
atrid +r +s +h MSDOS.dos 
cls