Windows Management Instrumentation (WMI): for the connection to succeed, the remote computer must permit incoming network traffic on TCP ports 135, 445, and additional dynamically-assigned ports, typically in the range of 1024 to 1034.
- Stop the Symantec Embedded Database and Symantec Endpoint Protection Manager service from services.msc
- Go to: C:\Program Files\Symantec\Symantec Endpoint Protection Manager\data\outbox\ImportPackage
- Delete the files from Import package and monitor the directory
After succesful installation Symantec Installation Manager 7.5.21 displayed a new version available, just a regular upgrade. After upgrading SIM went into crazy loop showing the following message:
"Another installation is requiring a reboot to complete changes to the system. You must reboot your computer before you can use Symantec Installation Manager. then Launch Symantec Installation Manager again."
Sever (Win 2008R2) has been rebooted at least 4 times until the following solution was discovered: