Possibly. I use Firefox with NoScript, and so far had no warnings of any kind here.
Maybe this is why forum code is off. But html isn't.
I hope Robert won't have to disable posting pics, just disable certain tags, like .exe, .js, etc, like other forums can.
But if he has to, I will understand for security reasons.
It may be coming from google-analytics.com, which I block.[?][?][?][?][?][?]
My theory is why they reappear after reboot, is there is a new program starting up with your computer. If you can identify the program, and stop it from starting up, that may solve it.
But best bet is to run an online scan with Trend Micro.
And download and scan with a program called "Hijack this" and post it on a tech forum for those that are good at analyzing it. Just some ideas.