Anybody had a message from Windows warning about these forums?

I came here last night for a small post and it warned me before, this morning it warned me again but I still did what I do here before breakfast (my computer was not happy about that - it tried to get me out of here once) then at least once later it warned me again to not enter (did not then) and it looked back to normal when I was writing something earlier but then another warning when I wanted to post. Right now it looks okay.

I got scared but I figured I have so much protection that it should be okay. Normally though when I have that warning I either leave or do not enter, this was the first time getting that with a website I go to every day.

I have to admit I have no clue what a security certificate is and if it matters or not when you still enter a website that do not have it!