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Problems following the Windows installation tutorial with 2.4.2

I'm needing to use OpenCV on Windows and was intending to follow the instructions to install the pre-built binaries from

http://docs.opencv.org/doc/tutorials/introduction/windows_install/windows_install.html

As instructed, I went to the SourceForge page (http://sourceforge.net/projects/opencvlibrary/files/opencv-win/) and downloaded OpenCV-2.4.2.exe from http://sourceforge.net/projects/opencvlibrary/files/opencv-win/2.4.2/. The instructions say to "Start the setup and follow the wizard." However, the .exe file is just a 7-zip self-extracting archive. All it does is unzip the OpenCV archive. After unpacking the archive there's no setup.exe or similar program.

Can anyone point me at what I'm missing?

Problems following the Windows installation tutorial with 2.4.2

I'm needing to use OpenCV on Windows and was intending to follow the instructions to install the pre-built binaries from

http://docs.opencv.org/doc/tutorials/introduction/windows_install/windows_install.html

Can anyone point me at what I'm missing?

EDIT: The MD5 hash of that .exe file doesn't match the given MD5 hash in checksum.txt. The downloaded file's hash is 6282b0a95f1d4258ba74cbcbca1f3d28. I've re-downloaded the file twice and re-verified the same (wrong?) hash.

Also the same thing happens with 2.4.3. The hash is wrong, and it is only a self-extracting 7-zip archive.