This is the error I see in the event viewer.
Faulting application name: nzbdrone.console.exe, version: 2.0.0.3594, time stamp: 0x56576739
Faulting module name: clr.dll, version: 4.0.30319.34209, time stamp: 0x5348961e
Exception code: 0xc0000005
Fault offset: 0x001a31f6
Faulting process id: 0x19ec
Faulting application start time: 0x01d129bc97a335aa
Faulting application path: C:\ProgramData\NzbDrone\bin\nzbdrone.console.exe
Faulting module path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Report Id: b5319b44-962d-11e5-80c7-d05099c044bf
Faulting package full name:
Faulting package-relative application ID:
I am running Windows Server 2012 R2. Only just recently rebuilt.
This is also a clean install of Sonarr.
Based on the log, it seems to be an issue with .Net, but it seems .Net v4 is built into the OS.
I have run Windows Update and install the latest updates available and there are no new ones for .Net.
Anyone got any ideas/suggestions?