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You may also be running into problems with windows patches not being up to date.
Please run the following command:
WMIC QFE|find "KB2999226"
It should return information on the patch. If it returns nothing, you're missing that update. You could get it by downloading from here: https://www.microsoft.com/en-us/download/confirmation.aspx?id=49093 or doing a windows update.
Danish