How to change windows7 & windows server 2008 product key

Hi friends, one of my colleague asked me hey shahrukh how can I 


change windows7 product key ?

then i given him a solution & I also like to share this with you....

OK let's start

first login with administrator account into your windows7 or windows 

server 20008

now go to Run type CMD press enter (it will open CMD)

in the CMD type Slmgr /ipk your product key (press enter)

Congratulations you have Successfully changed your product key

There are so many things you can do with various command line 

switches, if you want to help for switches type the following command into CMD.

Slmgr /? (press enter)

Work Smarter...