What is w3wp.exe?

Question

I have a WCF service running under a service user on my local system. Every time I try to debug it is giving me a message Attach Security warning.<

Answer 1

Chris pretty much sums up what w3wp is. In order to disable the warning, go to this registry key:

HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\10.0\Debugger

And set the value DisableAttachSecurityWarning to 1.