DELL Diagnostics Setup Program Ver 3.35 1. Format a disk in the floppy drive and make it a system disk. FORMAT A: /U/S 2. Copy DIAG335.EXE to the formatted disk. COPY DIAG335.EXE A: 3. Move over to Disk A: and type DIAG335 and ENTER. 4. The file will expand to this disk. 5. Reboot the computer with the diag disk in the A: drive and the diagnostic program will run.