Qt - Error 2 at compile time

Question

I just downloaded Qt SDK 4.8.1 and, after installing it, I simply tried to compile a default C++ project, but I got this strange error.

16:50:24: Runn

Answer 1

I had somewhat similar problem in Qt 5.3

21:22:03: Running steps for project Server...
21:22:03: Configuration unchanged, skipping qmake step.
21:22:03: Starting: "C:\Qt\Qt5.3.2\Tools\mingw482_32\bin\mingw32-make.exe" 
C:\make\bin; -f Makefile.Debug
Makefile:34: recipe for target 'debug' failed
process_begin: CreateProcess(NULL, C:\make\bin; -f Makefile.Debug, ...) failed.
make (e=2): The system cannot find the file specified.

mingw32-make: *** [debug] Error 2
21:22:05: The process "C:\Qt\Qt5.3.2\Tools\mingw482_32\bin\mingw32-make.exe" exited with code 2.
Error while building/deploying project Server (kit: Desktop Qt 5.3 MinGW 32bit)
When executing step "Make"

I did the following to get rid of the error.
From the left pane of the Qt,

Projects > Build > Build Environment:

Check the Clear System environment