When you start your computer, you may receive the following
Windows could not start because the
following file is missing or corrupt:
This issue may occur if either of the following conditions
- The Fastfat.sys file is damaged or missing.
- The RAM in your computer is damaged or is not installed
To resolve this issue:
- Make sure that the RAM in your computer is not damaged and
is installed correctly:
Warning In the following procedure, you will remove RAM from your
computer. Do not complete this procedure unless you are very familiar with the
correct precautions to use when you remove internal computer hardware
components. The internal components of some computers may be damaged by static
electricity discharge, use of too much force for removal or insertion, or the
use of inappropriate tools. Microsoft recommends that you contact a qualified
technician for repair of internal computer components. For information about
the correct handling of computer components, contact your computer
For information about how to
contact your computer manufacturer, visit the following Web site:
- Turn off your computer.
- Remove the memory modules that are installed in your
computer, but leave enough RAM for your computer to start and run Windows.
For more information about the Windows RAM requirements, click the following article number to view the article in the Microsoft Knowledge Base:
System requirements for Microsoft Windows 2000 operating systems
- Start your computer. If you still receive the error
message that is described in the "Symptoms" section of this article, remove a
different memory module. You may have to restart your computer several times to
identify the specific memory module that is not working correctly.
- If you determine that one or more memory modules are
damaged, replace the damaged RAM, and then test to determine if the issue is
resolved. If the issue is resolved, do not complete the remaining steps. If the
issue is not resolved or you determine that none of your memory modules are
damaged, go to step 2.
- Important If your computer is using the NTFS file system, you cannot use
the following procedure to expand the Fastfat.sys file. Instead, you must
create a parallel installation of Windows 2000.
For additional information about how
to create a parallel installation of Windows 2000, click the following article
number to view the article in the Microsoft Knowledge Base:
266465 Start your computer by using a startup disk that
contains drivers for your CD-ROM drive. For example, you can use a startup disk
from a computer that is running Microsoft Windows 98 or Microsoft Windows
HOW TO: Perform a Parallel Installation of Windows 2000
- At the command prompt, type cd
c:\winnt\system32\drivers, and then press ENTER.
- Type dir fastfat.sys, and then press
ENTER. If you receive a "File not found" message, go to step 6. If you do not
receive a "File not found" message, go to the next step.
- Type ren fastfat.sys fastfat.old,
and then press ENTER.
- Type CD-ROM drive
letter:, and then press ENTER.
- Type cd i386, and then press
- Type expand.exe fastfat.sy_
c:\winnt\system32\drivers\fastfat.sys, and then press
- Type c:, and then press
- Restart your computer.
For more information about how to troubleshoot your Windows
2000 installation, visit the following Microsoft Windows 2000 Resource Kit Web
Article ID: 810091 - Last Review: May 16, 2014 - Revision: 6.0
- Microsoft Windows 2000 Professional Edition
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