How much memory does windows7 32-bit support?

Hey! One thing I want to clear you that there is nothing to do windows with the amount of memory of the RAM. The maximum memory capacity depends only on the mother board of a computer. If motherboard support the 4 GB or the 8 GB RAM than that must be supported by the windows. The only advantage that a window take from the amount of RAM memory is the better the RAM the faster the window will work. Now if your system is not recognizing the memory that you have installed than you have to change the motherboard for that. You can change the new and advance mother board that can support a maximum RAM up to 8 GB which is really incredible. You can also check your RAM by plug-in out and in that so that your 4 GB RAM may work and recognize by your system. It was really nice to help you on this.