[RESOLVED] Invalid command.com

July 3rd, 2000, 12:36 PM

I am getting an invalid command.com when booting from all types of media and with all dos and windows boot disks. Can anyone help?

pcshark · July 3rd, 2000, 02:29 PM

Are you certain that the system BIOS is set to boot from A: first? If the system is set to boot from C: first, and the hard drive has no system files on it, or the system files are corrupt, then you will get the same message even if you have a bootable floppy in the A: drive. Set the system boot options to A: then C:, or something like that, and try again with the bootable floppy.

------------------
R. Bret Walker, CNE

Wondering what videos to rent this weekend? Check out The People's Reviews, movie reviews written for the people and by the people.

July 20th, 2000, 05:59 PM

Actually if it's booting an empty hard drive first you will get "no operating system found" Try making a new disk from another computer. HOWEVER, do not use the utility in Add/Remove Programs. Instead go to windows explorer and right click the A drive, click format and check copy system files. try this disk and see what happens.

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There is no Spoon!

Milenko · July 20th, 2000, 06:31 PM

maybe bad boot media (make another boot floppy), maybe back RAM (replace), or maybe a burnt processor. I had one doing that once and it turned out that the CPU fan was not working (why didn't i check that first?) and the CPU burnt. Go figure....

July 24th, 2000, 10:06 PM

You probably have a virus on your boot sector of your hard disk. Try using an anti-virus program. Or at the command prompt type "fdisk /mbr" it will rewrite your boot sector.

Ruslan · July 26th, 2000, 07:25 PM

Agree with epiccs.
1.I'm use Ontrack Disk Manager 7.x running from diskette in advanced maintenance mode to fix this problem first.
2.Then, if all working O'k, You can install WIN95/98 and it should kill made by DM changes in boot sector.
3.If not - use Norton Disk Doctor (often called as Norton Disk Destroeyer,if You want) from NU8 (on FAT16 partitions) running with option:
ndd c:/rebuild.
I have save lots of HDD from trash doing so.
Of course, all information on this HDD will be lost.
4.Another possible source for this problem - bad MoBo' cashe. Try to disable MoBo cashe and reboot.

July 3rd, 2000, 12:36 PM	#1
mlesygma Guest Posts: n/a	Invalid command.com I am getting an invalid command.com when booting from all types of media and with all dos and windows boot disks. Can anyone help?

July 3rd, 2000, 02:29 PM	#2
pcshark Registered User Join Date: Jul 1999 Location: Pitman, NJ USA Posts: 568	Are you certain that the system BIOS is set to boot from A: first? If the system is set to boot from C: first, and the hard drive has no system files on it, or the system files are corrupt, then you will get the same message even if you have a bootable floppy in the A: drive. Set the system boot options to A: then C:, or something like that, and try again with the bootable floppy. ------------------ R. Bret Walker, CNE Wondering what videos to rent this weekend? Check out The People's Reviews, movie reviews written for the people and by the people. __________________ R. Bret Walker, CNE (I'm not a Master Tech, but I play one on TV) Wondering what videos to rent this weekend? Check out The People's Reviews, movie reviews written for the people and by the people.

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July 20th, 2000, 05:59 PM	#3
MAYHEM Guest Posts: n/a	Actually if it's booting an empty hard drive first you will get "no operating system found" Try making a new disk from another computer. HOWEVER, do not use the utility in Add/Remove Programs. Instead go to windows explorer and right click the A drive, click format and check copy system files. try this disk and see what happens. ------------------ There is no Spoon!

July 20th, 2000, 06:31 PM	#4
Milenko Registered User Join Date: Aug 2000 Location: PA Posts: 761	maybe bad boot media (make another boot floppy), maybe back RAM (replace), or maybe a burnt processor. I had one doing that once and it turned out that the CPU fan was not working (why didn't i check that first?) and the CPU burnt. Go figure....

July 24th, 2000, 10:06 PM	#5
epiccs Guest Posts: n/a	You probably have a virus on your boot sector of your hard disk. Try using an anti-virus program. Or at the command prompt type "fdisk /mbr" it will rewrite your boot sector.

July 26th, 2000, 07:25 PM	#6
Ruslan Registered User Join Date: Jun 2000 Location: Toronto,Ontario,Canada Posts: 2,478	Agree with epiccs. 1.I'm use Ontrack Disk Manager 7.x running from diskette in advanced maintenance mode to fix this problem first. 2.Then, if all working O'k, You can install WIN95/98 and it should kill made by DM changes in boot sector. 3.If not - use Norton Disk Doctor (often called as Norton Disk Destroeyer,if You want) from NU8 (on FAT16 partitions) running with option: ndd c:/rebuild. I have save lots of HDD from trash doing so. Of course, all information on this HDD will be lost. 4.Another possible source for this problem - bad MoBo' cashe. Try to disable MoBo cashe and reboot.