Issue: Transport service won’t start on exchange 2010 server.
Event log details: Transport Mail Database: MSExchangeTransport has detected a critical storage error, updated the registry key (SOFTWAREMicrosoftExchangeServerv14TransportQueueDatabase) and as a result, will attempt self-healing after process restart. Event id: 7001/17106
Resolution: Stopped transport service, remove queue database, restart transport service