Sometimes , the Phishing Filter can cause problems so disabling the feature can be a valuable troubleshooting step. I do this by changing the registry. Here is a content of my DisablePhishingFilter.reg file:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\PhishingFilter]
"ShownVerifyBalloon"=dword:00000003
"Enabled"=dword:00000000

[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\PhishingFilter]
"ShownVerifyBalloon"=dword:00000003
"Enabled"=dword:00000000