Since installing BitDefender I get an error message

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Τελευταία απάντηση από FredMcD

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2/4/18, 8:01 μ.μ.

This weekend I installed BitDefender on mine computer. Now I can't open any website en I get this message "Secure Connection Failed An error occurred during a connection to duckduckgo.com. Peer’s certificate has an invalid signature. Error code: SEC_ERROR_BAD_SIGNATURE

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites

In Opera I have no problem, but I like to work with Firefox. Please help me.

This weekend I installed BitDefender on mine computer. Now I can't open any website en I get this message "Secure Connection Failed An error occurred during a connection to duckduckgo.com. Peer’s certificate has an invalid signature. Error code: SEC_ERROR_BAD_SIGNATURE The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem. Learn more… Report errors like this to help Mozilla identify and block malicious sites In Opera I have no problem, but I like to work with Firefox. Please help me.