why did you kept the 32 bits version ? we want to use more than 4GB of memory. that's why we bought hardware to do that. But you still provide us a 32 bits W7. Should I Install MAC OS to have the benefits of my hardware ?

Please understand that old computer onlysupport 32bit Windows, and some application doesn't support 64bit Windows. That's why Microsoft still provide 32bit Windows 7. You can choose 64bit Windows 7 to use more than 4GB of memory. For more information, please refer to the following link:32-bit and 64-bit Windows: frequently asked questionsHope it helps.