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Basically, when you read the actual error you can see that there is an error in the linker. This means that you are either:

  • Not adding the correct libraries in your project linker options
  • Not using the correct libraries (meaning x32 bit on x64 bit systems)
  • Not adding the library location to your system path variable

The following installation guide handles all necessary steps. Please check again that you have not yet forget some stuff.

http://blog.hcilab.org/bastian/2012/06/installing-opencv-2-4-windows-7-visual-studio/

Guide is for windows 7 x64 bit but it shows all necessary steps that you also apply on other systems.