Ok to the problem. When i go into a thread/page and try to go back, i cant unless i double click back. When clicking the drop menu next to the back button, there are to links called something along googleads.com or something. Basically the ads just come from no where, i never go to the links, but they just show up every time i go back. See screenshot for more details as i probably suck at explaining this.
Have run virus scanners/malware scanners and picked up nothing.
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