Conact customer service - Worlds most ironic instruction
I downloaded the free version of Booster for the PC. Then I bought a license. I try to enter the activation code and get a message, "Unknown error. Please contact Customer Service." How do I contact "Customer Service"?
You could start here:
Or check these articles:
Or raise a support ticket:
I have moved your post to the relevant board for Booster.
For your enquiry, it is likely that the error might be caused by the internet connectivity to the servers. The first thing would be to check the TLS settings; if you have already tried to reset your IE settings and also verify the TLS settings as per the above links, please let us know if there is any other Anti-virus or Anti-spyware programs running on the computer (apart from any F-Secure Anti-Virus - if installed).
What is the version of the Booster which is downloaded to your computer, is it the latest version?