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Sophos Endpoint Security and Control: 'Shutdown of a process has timed out' is displayed when removing Symantec AntiVirus Corporate Edition 9.0 on Windows NT 4

Issue
The message 'Shutdown of a process has timed out' is displayed on the computer, causing removal of Symantec AntiVirus Corporate Edition 9.0 and installation of Sophos software to fail, when using:

to remove Symantec AntiVirus Corporate Edition 9.0 on a computer running Windows NT 4.

Sophos product and version
Sophos Endpoint Security and Control, version 8.0 and above
Sophos Enterprise Console, version 3.1 and above
Sophos Endpoint Security and Control standalone installer

Operating system
Windows NT 4

What to do

On the affected computer, click 'Retry' to continue with the removal of Symantec and installation of Sophos software.

When removing Symantec AntiVirus Corporate Edition 9.0 from your computers, ensure that the computers are booted up 15 minutes prior to starting the 'Protect computers' wizard or the standalone installer.

Technical Information
A number of the Symantec processes required to for removal take several minutes to start. The timeout error is displayed when they are not available.

If you need more information or guidance, then please contact technical support.