What is invalid system disk


I get this message when I reboot "invalid system disk, replace the disk then press any key" and there isn't any cd or floppy disk in the drives. If I press a key the same message appears again.

Why do I get this message?


This question was answered on July 21, 2003. Much of the information contained herein may have changed since posting.


- Security software has disabled access to drive C

- Your computer is running an anti-virus program

- Windows Setup was unable to copy the system files to the hard disk

((Last resort))

- Your computer may be infected with a boot-sector virus such as the AntiCMOS.A virus


First try to go in to your computers BIOS To do this reboot the machine and keep pressing F10 (For most computers. or either Del key) to enter setup Once in setup move to the advance tab. Look for boot order Change your boot order to C: drive So that your computer looks for the C: drive where the Operating System is installed to boot Save the changes and restart your computer

Computer Is Running Anti-Virus Software

Start your computer by using the Windows Startup disk you created during Windows Setup, and then use the sys command from the Windows Startup disk to restore the system files to the hard disk

Some computers use built-in anti-virus software that must be disabled in the computer's BIOS For information about how to change settings in the BIOS, view the computer's documentation or contact the manufacturer of your computer

((Last resort))

Computer Is Infected with a Virus

Use an anti-virus program to detect and remove the virus, and then reinstall Windows Boot-sector viruses infect computers by copying information either to the boot sector on a floppy disk or the partition table on a hard disk During startup, the virus is loaded into memory Once in memory, the virus typically infects any non-infected disks that your computer is connected to

I hope this has helped.

Good luck

- stanley alexander

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Posted by Student of Katharine Gibbs School - New York on July 21, 2003