Which is the best windows for Core2Duo Cpu based Computer and Laptops.

Now a days Laptop and specially Desktop Computer are going cheap day by day. Many of the User's can't know which is best Operating System for their Computers/Laptops so that they can get optimal performance.

These are things you must consider before using any OS on Core2due Pc's/Laptops:
1:  Core2Duo are capable to install the latest versions of the OS released, e.g Window 8.1 and Windows 10 (Technical Preview). But in a sense of performance and smoothly flow of programs running needs a higher hardware e.g Higher Ram Minimum 2GB For windows 7, 4GB for Windows 8.1or Windows 10 and Graphic card Minimum 512 MB.
2:  The latest version of Microsoft Windows uses Graphics component of your computer so it make your Pc Slow.
3: If your hardware is less then the hardware discuss above you must use Windows Xp or Windows Vista to get best Performance. Otherwise you will face slow speed or hang problem during use.