I have copied and pasted the the Licence Key number and my name (from confirmation email) to register purchase.....but it will not accept. Help please.... or my money back.
Are you getting an error message?
See the registration advice here: https://support.piriform.com/hc/en-us/articles/204043844--Problems-activating-or-registering-CCleaner-Professional
If that article doesn't help then please contact support by email to: support@ccleaner.com
Use the same email where you got the confirmation email if you can, or tell them what it was so that they can find your purchase.
PS. Please don't post any specific reference or licence numbers, or any pesonal details, on this open forum - sombody could steal them.