The batch file, SAVEMBR.BAT, is hard coded to create a file called "MYMBR" in the directory that you run the BAT file in. It's a 'quick & dirty' so will show you a lot of gibberish on the screen and even two error messages. Ignore all that and look for the file MYMBR to have been created at completion. You should run this from a BOOTABLE diskette from your A: drive, as some viruses (& Windows NT) prevent you from reading the real MBR from your system. The BOOTABLE diskette *must* have a compatible copy of DEBUG.EXE as the BAT file will need it. IF YOU HAVE 2 HARD DRIVES -- READ THIS SECTION! Run SAVEMBRC.BAT *AND* SAVEMBRD.BAT These will capture the MBR from BOTH Hard Drives. SAVEMBRC.BAT is identical to SAVEMBR.BAT, but the output file will be named "MYMBR_C" SAVEMBRD.BAT is nearly the same as SAVEMBRC.BAT, but the output file will be named "MYMBR_D" Both could have been done together, but the complexity of testing if there really is a second drive is avoided by the simpler expediency of two separate scripts. ------------------------------------------------------------------- For the Technically curious: What you will see & what it does: (you should see "Writing 0200 bytes" as one of the final messages in the gibberish).. If you prefer to step through the process, here are the instructions to get the MBR by 'hand' C:>debug | We'll be using DEBUG -a 300 | assemble (write the program) at 300 0XXX:0300 mov ax,201 | debug shows you the addr, you enter the mov.. 0XXX:0303 mov bx,100 | etc. 0XXX:0306 mov cx,1 | 201 = READ 1 sector, 100 = I/O buffer, 0XXX:0309 mov dx,80 | 1 = 1st sect. 80=1st HD (81=2nd HD, 82=3d etc) 0XXX:030C int 13 | int 13 = BIOS I/O 0XXX:030E int 20 | int 20 = STOP PGM to DOS 0XXX:0310 | enter.. (no input) to stop assembling | -rip | change starting addr of pgm IP 0100 | debug shows you the existing start.. :300 | will start at 300 (as entered above) -g 310 | let it run until INT 20 is done | Program terminated normally (0)| expected response -rbx | assure BX is 0 BX 0000 | most likely is already.. :0 | assure CX -rcx | is set to 200 CX 0000 | :200 | =size of output file(200hex = 512 bytes) -n mymbr | n(ame) the file 'mymbr' -w | write from default location 100 Writing 0200 bytes | expected response -q | done, end DEBUG | A:>dir mymbr | should have this file now Volume in drive A is Serial number is ECE4:FDFA Directory of A:\mymbr 2/01/99 11:35 512 MYMBR 512 bytes in 1 file and 0 dirs 512 bytes allocated