EMC is short for exchange management console in Microsoft exchange 2010 mail system, and it’s the main tool of Exchange.
When trying to start EMC from start menu, the following dialog boxes appear, and runs for a few seconds
Step 1. The EMC homepage will appear after a few seconds regardless of the dialog boxes above
Step 2. Click Cancel menu to close the boxes above
Step 3. It’s an known issues of Microsoft, you can just ignore it
During closing EMC, the same dialog boxes will appear, handle it with the same way