When run from a default system's command prompt, a messagebox with the following content:

The program can't start because libgcc_s_dw2-1.dll is missing from your computer. Try reinstalling the program to fix this problem.

When run from the Qt SDK's command prompt:

C:\Qt\2010.01_Static\bin>qmake -v
QMake version 2.01a
Using Qt version 4.6.1 in C:/Qt/2010.01_Static/lib