3- Difference between 32 bit & 64 bit operating systems!

1. The terms 32-bit and 64-bit refer to the way a computer's processor (also called a CPU), handles information. The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than a 32-bit system.
2. The 64-bit version of Windows 7 handles large amounts of random access memory (RAM) more effectively than a 32-bit system. It is faster and also allows you to run several programs at one time.

Benefits of going to Windows 7 64-bit: 

1. With 32-bit Windows, you can use a maximum of 4GB RAM. 
2. 64-bit Windows 7 runs very fast with 4GB and you can upgrade your RAM to 8 or 16 GB later, making your system future-proof.