Get Help:Ask a Question in our Forums|Report a Bug|More Help Resources
Last post Mar 26, 2012 02:55 AM by Dino He - MSFT
Mar 23, 2012 05:10 PM|LINK
attach to crashing process, there already is a debugger attached'
Mar 26, 2012 02:55 AM|LINK
That is may because you Use IE or Chrome or FireFox Developer toolbar.
Please read the article, I think it will resolve your problem:
Please mark as answer if it helpful.