Build fails with "Could not copy the file.. because it was not found" in Visual Studio 2013

Question

I get the following errors when building with Visual Studio 2013 (Update 3) several projects:

Could not copy the file ".." because it was not found.

Could not copy ".." to "..". Exceeded retry count of 10. Failed.

Unable to copy file ".." to "..". The process cannot access the file ".." because it is being used by another process.

I noticed with "Unlocker" that for some strange reason that "QTAgent32.exe" is blocking some of those files.

This seems to be a big issue:

https://connect.microsoft.com/VisualStudio/feedback/details/533411

Visual Studio "Could not copy" .... during build

Answer 1

Uninstalling the "Productivity Power Tools" extension in Visual Studio 2013, restarting Visual Studio and rebuilding did it for me. I found this workaround here:

https://connect.microsoft.com/VisualStudio/feedback/details/533411