Deployment Manager runs on the RavenDB database. This uses custom Windows system performance counters to monitor its performance.  Performance counter information is stored in the registry, and this information has become corrupted on the Deployment Manager server. According to Microsoft KB300956, this can happen if "certain extensible counters corrupt the registry, or if some Windows Management Instrumentation (WMI)-based programs modify the registry.”

Running the following commands from an administrative command prompt may fix this. Since this will modify the registry and will remove any custom performance counters that have been defined, create a restore point first.

For a 64 bit OS:

lodctr /R

lodctr "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\corperfmonsymbols.ini"

Or for a 32 bit OS:

lodctr /R

lodctr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\corperfmonsymbols.ini"

For more information, see http://stackoverflow.com/questions/1540777/performancecounters-on-net-4-0-windows-7

Once the performance counter information has been repaired, restart the Red Gate Deployment Manager service.

If this doesn't fix the problem, [Microsoft KB300956] provides instructions for manually repairing your system’s performance counter registry.