Is anyone still having trouble with this? I'm on a Mac running the newest OS, and yesterday I couldn't connect to 2 seperate wifi networks. I can today, from my home office network. I turned off Avast yesterday, turned off my firewall, and still bupkis. I will try again this week when I'm out and about, but everyone else in both establishments had access, and so did my iphone. Just after installing Avast for the first time in years, did I have the issue.