Exchange Transport Service won’t start

This error occurs after installing AVG Cloud Care on a server which previously had AVG Administration Console and AVG Server installed. 

The problem occurs due to remaining Transport Agents. You may need to amend “2013” with the correct version of AVG server that was previously installed.

• Open Microsoft Exchange Management Shell:

Type in:

1. Uninstall-TransportAgent “AVG 2013 Antivirus SMTP transport agent”  AND AT THE CONFIRMATION SCREEN TYPE “Y” FOR YES AND HIT ENTER.
2. Uninstall-TransportAgent “AVG 2013 Antivirus routing transport agent” AND AT THE CONFIRMATION SCREEN TYPE “Y” FOR YES AND HIT ENTER.
3. Uninstall-TransportAgent “AVG 2013 Antispam transport agent” AND AT THE CONFIRMATION SCREEN TYPE “Y” FOR YES AND HIT ENTER.

https://social.technet.microsoft.com/Forums/en-US/d8a2603e-efa2-4fe1-82ea-6265fe28c77f/exchange-transport-service-problem-after-update-avg?forum=exchangesvrsecuremessaginglegacy