Registration of CCleaner PRO will not accept Lic Key

CCleaner for Windows CCleaner Windows Bug Reporting
1

WINDOWS 10 W/anniversary update will not accept License Key.

Multiple retries!

New computer - not an update from older OS.

2

It may be better to get in touch with Piriform directly for help with this

https://piriform.zendesk.com/hc/en-us/requests/new