Having decided to go back to PD9 as computer was struggling with PD10, reinstalled

CyberLink.20096904,2316,1_VDE100917-03
CyberLink.1519_contentPac_VDE100318-02
CyberLink.3305_GM6_Patch_VDE110624-04

I skipped all the earlier patches.

All appeared to install OK but will not allow activation! Keep getting 'Your activation key is incorrect. Please try again'

I know the key is correct because I am getting it off the Cyberlink website! (from the 'my products' section) and also tried it on another computer where it worked fine.

I assume it must be something to do with some PD10 residue on my system??

I have just this week done a reinstall on the whole computer so it is fairly 'clean' but I did initially try PD10 before removing it as it did not behave, PD9 always ran OK.

Rather desperate as trying to complete a project for somebody before next Thursday!!

Any help appreciated, I have tried Cyberlink support but don't remember them being that helpful last time contacted them. Director Suite 365
AMD FX-8320 3.50 GHz Eight-Core
Samsung SSD 850 EVO 250gb (OS)
Seagate 2TB SATA-III Hybrid 7200RPM Hard Drive (Data)
Toshiba 4TB SATA-III Hard drive (Archive)
24GB Memory
Nvidia GeForce GTX 650 2gb
Microsoft® Windows 10 (64-bit)