I agree with the suggestions above. Also note that depending on the version of Windows and the servers you are using, TLS may not even be enabled. Some systems I come across on a weekly basis still have SSL 1.0 enabled. smh Also, you may want to look at Vipre (not a typo) as a replacement AV. It is much lighter on the system and has an incredible customer service, engineering, and product features. I have it on my home PCs. At my last job, we used it enterprise wide, and they even gave us a free home license for every user! (I'm sure it was bundled into our licensing). Finally, if you are running Java, remove all versions you have, and if you need it (such as for HD), then install only the latest version and keep it updated. Finally, you really don't want to run more than one AV on your system at a time. There is a lot of potential there for process threading problems if they fight over the same files to scan it. So stick with just one.
Also, what browser are you using?