When enabling HTTPS decryption I click on the Yes button of the "Trust the Fiddler Root certificate" dialog but get an error saying "Unable to configure Windows to Trust the Fiddler Root certificate". The log window has: -= Fiddler Event Log =- See http://fiddler2.com/r/?FiddlerLog for details. 07:37:58:8472 Fiddler Running... 07:37:58:9953 HTTPSLint> Warning: ClientHello record was 508 bytes long. Some servers have problems with ClientHello's greater than 255 bytes. https://github.com/ssllabs/research/wiki/Long-Handshake-Intolerance 07:37:58:9963 Assembly 'C:\Program Files (x86)\Fiddler2\CertMaker.dll' was not found. Using default Certificate Generator. 07:37:59:0003 /Fiddler.CertMaker> Using .+ for certificate generation; UseWildcards=True. 07:37:59:1693 !SecureClientPipeDirect failed: System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The certificate chain was issued by an authority that is not trusted for pipe (CN=*.icrc.trendmicro.com, O=DO_NOT_TRUST, OU=Created by http://www.fiddler2.com). 07:37:59:2073 HTTPSLint> Warning: ClientHello record was 508 bytes long. Some servers have problems with ClientHello's greater than 255 bytes. https://github.com/ssllabs/research/wiki/Long-Handshake-Intolerance 07:37:59:2333 !SecureClientPipeDirect failed: System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The certificate chain was issued by an authority that is not trusted for pipe (CN=*.icrc.trendmicro.com, O=DO_NOT_TRUST, OU=Created by http://www.fiddler2.com). 07:38:05:0616 /Fiddler.CertMaker> Root Certificate located; private key in container 'c57aee424c14cd2a2c75ea01bc34e0a7_fba9d939-5fd3-4f67-b971-af140ea221a0' 07:38:06:3487 !Fiddler.CertMaker> Unable to auto-trust root: System.Security.Cryptography.CryptographicException: Access is denied. at System.Security.Cryptography.X509Certificates.X509Store.Add(X509Certificate2 certificate) at ..TrustRootCertificate() in c:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\DefaultCertProvider.cs:line 970 07:38:38:6325 [Fiddler] No HTTPS request was received from (firefox:9236) new client socket, port 19060.