Issue When attempting to install Sophos Anti-Virus the following error is shown:
Another installation is already in progress. Complete that installation before proceeding with this install.
The 'Sophos Anti-Virus Install Log_yyyymmdd_hhmmss.txt' (located in C:\Windows\Temp) shows the following message near the end of the log file:
Sophos Anti-Virus Install Log_yyyymmdd_hhmmss.txt
MainEngineThread is returning 1618
First seen in Sophos Anti-Virus for Windows 2000+
This error is seen if another installation is in progress or has not completed properly.
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