i also did migration, it works no problem.

step:
1. windows media tool to download iso file, use win7 usb tool to put at usb drive.
2. laptop uefi bios (it store oem key), hdd is gpt partition, win 8.1 upgraded to win10. (within upgrade installation, i chose 'keep nothing')
3. migrate to ssd by using easeus todo backup. (clone disk option)
4. now boot up fast as andriod phone.

* take note, the ori win8 key is stored in laptop uefi bios, so microsoft just detect n activate. now win10 do have a new key, alread written down on paper as safe copy.

This post has been edited by coolstore: Aug 9 2015, 09:19 PM