suddenly my visual studio express 2010 c++ stopped rebuilding my project.
When I first hit F7 the project builds and runs fine (heck, it\'s a hello world example).
T
I know this is an old question but thought I'd share how I resolved the issue.
If you're using Visual Studio and this error occurs, you can try to attach to process (CTRL+ALT+P) and find the "(program).exe" process. When you try to attach to it, an error will display stating that it failed to attach which removes the process from "running" (even though it's not...) You'll also be able to delete the (program).exe from your Debug folder.
Hope this helps someone! :)