Pop ups and 404 errors

[Dune]

For some reason I can't visit this site without popups on every pare, and often when I click on a thread I repeatedly get a 404 error (page not available).

My computer is junk, but this is the only forum where this happens to me.

 

[webbie]

That's strange! How junky is your machine? Is it the only one you have?
Can you try a second browser?

 

[Dune]

It was free and then I made it even worse. I am like a human computer disaster area.