Could not Load file or Assembly error after applying Cumulative Update

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Last week I have applied the Cumulative Update 50 for NAV 2013 R2 on my local machine. After I have applied the Cumulative Update I have tried to open NAV Administration Tool to restart the NAV Services but I have encountered the below error.

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The tool was not able to open the management dll , so I have browse to the service folder and reviewed the properties of *Microsoft.Dynamics.Nav.Management.dll* and found that it was blocked.

To unblock the dll I have clicked the Unblock check mark as shown in the below fig. and then tried to open the NAV Administration tool which then opened without any issues.

If you get could not load file or assembly, be sure to check the properties of the file.

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If you have any other Tips or suggestions, please do share them in the comments below.

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