F-Secure Booster/ Activating problem



 I had trying to activate my F-Secure Booster by entering the serial number in the Activation window. The activation failed with the following error message: "The serial number you provided is not correct. Please make sure you entered the serial number correctly."
I had checked and entered the serial number many times on windows.  I could't activate that program.




First I read these articles:


Next I reseted the internet settings. This relates to the Internet Explorer settings.

Go Internet Properties / Advanced / Reset Internet Explorer settings / Reset Internet Explorer settings to their default condition / Reset / OK. 

Then the new activation and the program began to work immediately.

After that  I reseted Internet Explorer settings back to what they were.


This trick worked on my computer. My operating system is Win 8.1. 


I'll hope this would help to someone who has the same problem. 



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