This patch will allow you to run Mind Prober from your fixed disk. You should be familiar with DEBUG. C>COPY A:*.* C>REN MP.EXE MP.ZAP C>DEBUG MP.ZAP -U68A9 XXXX:68A9 51 PUSH CX XXXX:68AA B400 MOV AH,00 XXXX:68AC CD13 INT 13 XXXX:68AE 720E JB 68BE XXXX:68B0 B404 MOV AH,04 XXXX:68B2 B600 MOV DH,00 XXXX:68B4 B200 MOV DL,00 XXXX:68B6 B182 MOV CL,82 XXXX:68B8 B527 MOV CH,27 XXXX:68BA B001 MOV AL,01 XXXX:68BC CD13 INT 13 XXXX:68BE 59 POP CX XXXX:68BF 7309 JNB 68CA XXXX:68C1 E2E6 LOOP 68A9 XXXX:68C3 B400 MOV AH,00 XXXX:68C5 B000 MOV AL,00 XXXX:68C7 EB05 JMP 68CE -E68A9 XXXX:68A9 51.90 B4. 00. CD.90 13.90 72.EB 0E.1A -U68A9 XXXX:68A9 90 NOP XXXX:68AA B400 MOV AH,00 XXXX:68AC 90 NOP XXXX:68AD 90 NOP XXXX:68AE EB1A JMP 68CA XXXX:68B0 B404 MOV AH,04 XXXX:68B2 B600 MOV DH,00 XXXX:68B4 B200 MOV DL,00 XXXX:68B6 B182 MOV CL,82 XXXX:68B8 B527 MOV CH,27 XXXX:68BA B001 MOV AL,01 XXXX:68BC CD13 INT 13 XXXX:68BE 59 POP CX XXXX:68BF 7309 JNB 68CA XXXX:68C1 E2E6 LOOP 68A9 XXXX:68C3 B400 MOV AH,00 XXXX:68C5 B000 MOV AL,00 XXXX:68C7 EB05 JMP 68CE -W Writing D480 bytes -q C>REN MP.ZAP MP.EXE Feel free to pass this around, but please remember that this took some work. Thanks, Warren Auyong