Please tell me the softwares that i can download to see and try various things happening inside the CPU

Answer 1

Here are some places to start:

http://www.cnet.com/

http://www.pcworld.com/#new

Click on Downloads and go from there.

Answer 2

If you are interested in doing assembler programming, you can download the assembler called NASM which will compile programs at the cpu level, namely addressing directly memory, registers, accumulators, etc.

Try tutorial:
http://www.drpaulcarter.com/pcasm/

Download:
http://sourceforge.net/projects/nasm/