Question: I get the following error:

```
g++: error: CreateProcess no such file or directory

```

whenever I try to compile a program. I have installed the MinGw 7.2 version at work on a windows machine and the problem does not occur, however after installing Windows SP3 on my home computer I get this error and I just can't figure it out since I have set all the environment variables properly. I even tried setting the path to `C:\MinGw\libexec\gcc\i686-mingw32\4.6.1` where cc1plus.exe and cc1.exe are located but still no luck.If i type this at the command line:

> 
> \_assoc .cpp=cpls
> 
> 
> \_ftype cpls=g++ "%1" %\*
> 
> 
> \_program.cpp
> 
> 
> 

it seemse to compile since I get compile time errors for the C++11 keywords which aren't recognized without the -std=c++0x switch. Any suggestions? Thanks in advance.

Answer: 
I had this error and I tried reinstalling MinGW, changing Path, etc

Finally, Removing the GCC\_EXEC\_PREFIX env variable made from the Environment variable for both User and System made it work!
And this was also the root cause of the reason why CMake said C compiler identification is unknown.
In my case I think it was because Qt ships with its own MinGW. That could be the reason for you too (ie, mingw already exists elsewhere)
You're compiling a 32 bit binary and trying to run it on a 64 bit system.

Compile the binary for the 64 bit architecture and it should work fine :)

<http://www.drangon.org/mingw/>