Fix Invalid System Disk Error

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Fix Invalid System Disk Error

Postby matthewforu » Thu Mar 05, 2009 6:58 am

You may also receive this error message when you start your computer by using a Windows Startup disk, or you may receive the following error message:

This version of Windows does not run on DOS 7.0 or earlier.

This issue can be caused by any of the following conditions:

* Your computer may be infected with a boot-sector virus such as the AntiCMOS.A virus.
* Your computer is running an anti-virus program.
* Your computer is using hard disk management software (such as Disk Manager, EZ-Drive, or DrivePro) for hard disk geometry translation. These tools provide support for large hard disks (more than 1024 cylinders) when your computer's Basic Input/Output System (BIOS) does not support large hard disks.
* Windows Setup was unable to copy the system files to the hard disk.
* Security software has disabled access to drive C.

To fix this issue use one of the following

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.

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.

Computer Is Using Disk Management Software
In some cases, Windows may not properly detect that you are using disk management software and may overwrite the master boot record (MBR) information. Refer to the documentation for the disk management software you are using for information about restoring the MBR.

Also, check the Setuplog.txt file for the following statement:
FSLog: BIOS Heads=:64:, BootPart Heads=:64:
The preceding number (64 in this example) may vary from computer to computer. If these two numbers are different, replace the system files on your hard disk according to the instructions in the following "Reinstall the Windows System Files" section. For additional information about how to determine if your computer is using a drive overlay program

Reinstall the Windows System Files
WARNING: If you are using Disk Manager or any other disk drive overlay program on a hard disk, make sure that the overlay driver is loaded before you use the sys command on that hard disk. If the overlay driver is not loaded and you use the sys command on the hard disk, the drive may not be recognized as being partitioned by the disk drive overlay program and you could experience loss of data or an inability to boot from the drive.

Although you can use the sys command with Ontrack Disk Manager and later versions of MicroHouse EZ-Drive (or EZ-Max) after the overlay driver is loaded, earlier versions such as EZ-Drive 2.01s require that operating system files be copied to the overlay installation disk and installed by the overlay utility. In such cases, the overlay may be damaged if you use the sys command on the hard disk.

1. Start your computer by using the Windows 95 or Windows 98 Startup disk.
2. At the command prompt, type the following commands, pressing ENTER after each command:

attrib c:\msdos.sys -s -h -r
copy c:\msdos.sys c:\
sys c:
attrib c:\msdos.sys -s -h -r
del c:\msdos.sys
copy c:\ c:\msdos.sys
attrib c:\msdos.sys +s +h +r
3. Remove the Windows Startup disk, and then restart the computer.

Security Software Enabled
Some third-party programs prevent (lock) access to hard disks in your computer. If this software is installed, contact the manufacturer about how to remove this software and safely restart Windows 98 Setup. For additional information about Windows Setup and troubleshooting
Posts: 33
Joined: Thu Jun 19, 2008 5:21 am

Re: Fix Invalid System Disk Error

Postby rustmandevil » Sat Apr 04, 2009 12:49 am

Invalid / Non System Disk error.

Invalid / Non System Disk error.

This error can be caused by one or more of the below possibilities.
Floppy or CD that is not bootable is currently in the computer.
BIOS or CMOS setup is not setup properly.
Hard disk drive does not have bootable files on it.
The hard disk drive is bad or not connected properly.
Floppy or CD that is not bootable is currently in the computer

Verify that no floppy diskette or CD is currently in the computer. If a diskette or CD is in the computer that is not bootable your computer may attempt to boot from that diskette or CD causing this error message.
BIOS is not setup properly

Additional information and help with getting into BIOS or CMOS setup can be found on document CH000192
Verify that your hard disk drive is setup and detected properly in BIOS. You're computer should list a hard disk drive installed either under the main page or the drives page in BIOS. If BIOS indicates the drive is not installed or not detected skip to Hard Disk drive is bad or not connected properly.
Verify the boot options are properly set in BIOS, almost all BIOS setups should contain options specifying how your computer boots. For example, most computers should have their boot options setup similar to the below example.

- Floppy drive
- CD drive
- Hard drive

Rest your BIOS to default values. Many BIOS will enable users to reset the values to the default settings. If you've tried the above options without success try resetting the BIOS.
Hard disk drive does not have bootable files on it

It is possible that or another bootable file may be missing from the hard disk drive. Follow the below steps to possible resolve your issue.

Windows 95, Windows 98, and Windows ME users
Boot from a bootable floppy diskette.
At the A:\> type fdisk <press enter>
If you receive a message no fixed disk present, read Hard Disk drive is bad or not connected properly.
If you are able to get into fdisk, choose option 4 to display the partition information. In the partition information, if the System is listed as FAT16 or FAT32 then continue to step 5. If you have a message indicating no partitions defined, no information is on your hard disk drive and you will need to create a new partition. See our fdisk page for additional information.
If you see FAT16 or FAT32 in fdisk press the ESC key until back at the A:\>
Once at the A:\> type, sys c: <press enter> (only do this command if you are using the same operating system that this diskette was created on).
This should return a message 'System Transferred', if you receive bad command or file name and have verified you have typed the command properly, you will need to obtain a bootable diskette with the file on it.
If system was transferred successfully, reboot the computer and issue should be resolved.

Windows 2000 and Windows XP users
Boot from either your ERD, your bootable Windows CD, or your bootable restore CD.
Once boot attempt to repair Windows. If you're able to repair Windows remove the disks and reboot the computer.

All users

If your operating system is not listed above or the above steps did not resolve your issue you can also try erasing the hard disk drive and starting over. Additional information about doing this can be found on document CH000186.
The hard disk drive is bad or not connected properly

If you have attempted all above suggestions and you are still encountering the same issues, verify the connections are properly connected to the computer if the hard drive was recently installed or the computer was moved.

Additional information and help with installing a hard disk drive can be found on document CH000413.

Unfortunately, if all connections are setup properly and all the above recommendations have been attempted, it is likely that the hard disk drive is bad and it will need to be replaced.
Posts: 3
Joined: Sat Apr 04, 2009 12:40 am

Re: Fix Invalid System Disk Error

Postby KevinHirn » Sun Nov 07, 2010 6:46 am

Very helpful thanks a lot Mathew.
Posts: 1
Joined: Sun Nov 07, 2010 6:40 am

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