ranjan2001 said:welcome to the genuine windows world, the activation is only meant for 1 machine only if u change ur machine in future bill gates say that u should buy another one for it.
For the same machine u can activate 3 times.
Should you change the hard drive and another piece of hardware - for example for a major upgrade such as a motherboard change that requires a re-installation - Microsoft will allow you to re-activate up to 10 times. You will not, however, be able to have more than one machine activated concurrently."