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Read Me First
This update resolves the "Winsock Mutex" security
vulnerability in Windows NT® 4.0, and is discussed in
Microsoft Security Bulletin MS01-003. Download now to prevent
a malicious user from running a special program to disable
your network functionality.
This vulnerability exists because the mutex (a tool to
prevent more than one process from accessing certain resources
at the same time) that is used to control access to networking
resources has inappropriately loose permissions. As a result,
a malicious user with physical access to a Windows NT 4.0
computer could write a program to gain control of the mutex
and deny access to all other users. By denying access to the
mutex, the malicious user's program could prevent any other
programs from using the networking functions of the affected
computer. This update corrects the inappropriate permissions
of the affected mutex. For more information about this
vulnerability, please read Microsoft Security Bulletin MS01-003.
This update applies to Windows NT 4.0.
How to download and install
- Select your language from the drop-down list above.
- Click Next.
- On the following page, click Download Now.
- Do one of the following:
- To start the installation immediately, select Run
this Program from its Current Location.
- To copy the download to your computer for installation
at a later time, select Save this Program to Disk.
- Click OK.
How to use
Restart your computer to complete the installation.
How to uninstall
- Click Start, point to Settings and click
- Double-click Add/Remove Programs.
- Select Windows NT 4.0 Hotfix [See Q279336 for more
information] and click Add/Remove to uninstall.