Visual Studio debug error about MSVSMON.EXE not appear to be running

Question

I have a program which when I hit F5 to run the program it shows this error and doesn't run:

Error while trying to run the project, Unable to start program 'F:....` The Microsoft Visual Studio Remote Debugging Monitor (MSVSMON.EXE) does not apear to be running on the remote computer ...

This is while the project was compiling successfully before. Is there any project setting that should be set in a wrong way sometime!?

I'm using Visual Studio 2012 Update 2.

Answer 1

I've discovered that the reason is not about downgrading! It's about a tunneling software called "Proxifier". While it's running on the system, it causes the Visual Studio this problem.