ErASe HdD nD cLEaR cMOS

Before doing the below routine ensure
that you read our disclaimer as well as
are sure that this is safe to do on your
hard drive. Some computer hard drive
manufacturers may void your warranty
or this may cause damage to the hard
drive when doing the below example.
This routine is useful in clearing DDO
and removing possible viruses. If this
routine completes successfully it will
erase everything from your Hard Drive
as well as your reset your CMOS values.
In the below debug routine, only type
what is in bold from line 3 to 17, you
will get a response if typed in properly.
If you get a response continue to type
the bold text as shown below in the
below example.
A:\>debug
-fcs:200 400 0
-acs:100
-xxxx:0100 mov ax, 0
-xxxx:0103 mov ax, cx
-xxxx:0105 out 70, al
-xxxx:0107 mov ax, 0
-xxxx:010a out 71,al
-xxxx:010c inc cx
-xxxx:010d cmp cx,100
-xxxx:0111 jb 103
-xxxx:0113 mov ax,302
-xxxx:0116 mov bx,200
-xxxx:0119 mov cx,1
-xxxx:011c mov dx,80
-xxxx:011f int 13
-xxxx:012l int 20
-xxxx:0123 (without typing anythhing.)
-g program terminated normally If you
are doing this debug routine to clear
out a possible virus turn off your
computer and wait and turn back on.
-q
Once back at DOS, reboot your
computer When your computer comes
back on from doing the above you will
get an error message as booting up
the computer, such as "Invalid
Configuration". You must enter CMOS
and set the time and date, save, and
reboot again. Once rebooted, you will
then need to run fdisk and recreate the
partitions. Once created, you will then
need to format the hard drive and
proceed as normal.