vladasyn
Not if it is Windows 8- Windows 8 would know if it is another hardware and ask for new serial.
You are allowed to upgrade your machine's hardware (under the Windows license).
What you're not permitted to do is use a single copy of Windows on more than one machine.
You *can* migrate a Win8 install to different hardware (upgrading your machine).
You'll have to call the toll-free number, they'll ask how many machines are currently installed with that copy of Windows.
If the answer is a legitimate "one", you'll be able to authorize that copy of Win8 on your upgraded machine.
A clean OS install is still the best option.