Following is what , i gathered information from cyberlink source
What can I do if I lost my activation key?
Before contacting customer support, try to locate the activation key through the following steps:
If you have registered your products:
If you have registered the software, you can log in CyberLink Members Zone
and select Manage My Products in the left menu, and then click Manage
CD-Keys tab. You will see all the keys you have registered before.
If you haven't registered the products:
Retail or boxed versions
: If you have a retail or boxed version, the CD sleeve/case should have an activation key sticker attached to it.Online/Download version
If you have the online/download version, you can check your email inbox
for your order confirmation e-mail. It provides you with the product
: If you got your software free
as a bundled version, the CD sleeve/case should have a sticker attached
to it. If not, please contact the hardware supplier to get a new key.
If you still have no luck locating the activation key, you will have to register as a CyberLink Member and submit a technical support form
to ask for a new key. You will need to attach a digital or scanned
image (in .jpg format) of your installation disc as the proof of
ownership of the original software copy.
: If you are reading this prior to having
lost your key, then we strongly recommend that you register your
software as this will keep your activation key safe and available if
you ever need it. You can always find Online Registration shortcut in
the CyberLink program folder of Windows Start menu