popups from different companies

I thought I was actually pretty good at taking spyware and malware out of other people's computer but now I am some in my own and I don't even know where to begin. Its only popups and some system messages from time to time. The popups only come when I'm navigating from one page to another. No homepage hijacking, no extra toolbars installed and no new software installed. I also didn't notice anything funny in the proccesses tab. Any help would be great.

 

i followed each and every step and program above. everything seems to be ok now. i'll let u know if anything else funny happens. thanx a lot for the help.