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I am getting this error "Unable to Start Debugging" in visual studio 2012.
I have also update the remote debugging sp2.
also uninstalled and reinstalled vs2012 and added sp. still facing the same issue.
My operating system is windows-8 64 bit.
Also tried to run in Administrator user still the same.
Unable to Start Debugging. visual studio 2012
I had the same issue, and fixed it by updating my credentials in the "Identity" setting, under IIS/Application Pools.
My password had recently changed, but the "Identity" was still set to my old credentials.
I've had the same problem this morning. Installing Visual Studio 2013 wasn't an option for me (And I very much doubt it would be for lots of people). Rebooting has usually solved the problem before, (and a bit less drastic),
Manually attaching the process (TOOLS -> Attach to process (ctrl + ALT +p)) to w3wp.exe for IIS, or IIsExpress.exe also worked, which leads me to suspect that VS is having trouble figuring out which process it should attach to automatically.