checking whether the C++ compiler (cl ) works... rm: cannot lstat `conftest.exe
': Permission denied
no
configure: error: installation or configuration problem: C++ compiler cannot cre
ate executables.
*** Fix above errors and then restart with "make -f client.mk buil
d"

http://stackoverflow.com/questions/1121386/unable-to-copy-file-reference-dll-to-bin-reference-dll-the-process-cannot-acces

Easy fix for Windows 7: Start the service "Application Experience" . Search for "Services" in "Control Panel".