Tyikki,
If you change out your current hard drive for a larger capacity drive, youll need to do a fresh install of Windows 8 on the new drive.
Keep in mind that if you have the OEM reinstallation media from HP, you can perform this installation without needing to obtain a new activation key. However, if youre performing the install with non-OEM installation media, you will need to obtain a new activation key.
Hope this helps.
Mike
- Proposed as answer by kelvin_hsuMicrosoft contingent staff, Moderator 3 hours 44 minutes ago
Instead of change it, I suggest buy external HDD if you need more space
I you insist to change, you need recovery CD from HP, but its depend on availability and some of country its not free
You cant transfer your activation key because its OEM
Contact HP support for better suggestion if you really want to replace it
- Edited by britishdhez 3 hours 58 minutes ago