I cannot run my Hello World app.

I get this error

C:\Users\Robert\AppData\Local\Android\sdk\tools\emulator.exe -avd Test_Device_-_Nexus_5_ARM -netspeed full -netdelay none
creating window 54 57 345 612
Error accepting connection, aborting

I have waited up to 30 minuites for the emulator to run and still nothing.

Thanks for your help in return