Popups from an unknown source
I keep getting these popup ads that start with a URL that includes "documentsandsettings/localsettings/temp" and then changes to the ad's URL. I've noticed it also creates folders labeled DlfnTmp1, DlfnTmp2, etc. in the documentsandsettings/localsettings/temp folder. I can't figure out what's causing these popups. I've already uninstalled DeskAd Service using Control Panel -> Add & Remove, but the problem is still occurring. When I run Spybot, it says there's no spyware, and yet I keep getting these popups.
When I run ad-aware, I get DealHelper. So I tried a search on the net for removal instructions, but none of the files that the instructions list to delete are actually on my computer.
It seems to be only on IE, but occasionally they come up even when I'm using FireFox. Any idea what's causing this? It's been happening ever since I visited dictionary.com and not only were there a lot of popups blocked but it kept requesting access to download .exe files and eventually caused my computer to crash. (That got fixed when I used restore and restored back to the day before I visited dictionary.com.)