Imposible! avast! has nothing to do with yahoo cookies.
What do you have at startup itens? These applications work on it:
I use and recommend Startup Delayer and Startup Control Panel. See there is you have anything related to yahoo… You can see links for download here at the section Startup Control Tools.
I recommend either that you scan your system against ad-awares: at the same link above, see section Ad-aware and Trojans Tools. Try SpyBot and Ad-aware from Lavasoft.
Maybe, as you said, your troubles are in the IE Zones and Privacy settings.
If you want to logon automatically into avast! forums, try Autoform 8)
Well, some of the Norton tools are not that bad ;D
Norton Utilities are quite nice… and some of the other tools are usable too - though in my opinion, they were better before Symantec bouth them from the original makers and changed them to fit their line (such as NIS or CleanSweep).
I hate Norton :)…it did not catch this virus that I have >:(
I used the free MicroTrend and it found a different one so I am going to do another through scan and see what happens…appears my computer was infected before I got Avast!.
Thanks Igor for your fair play with Symantec. But, we, users, hate NAV at all >:( Or better, the only advantage of NAV is that due to it, I’m here after so many troubles it brought to me ;D I agree with you, CleanSweep is a good one and some of the other parts of the it…
Cojo, the trash left behind could be cleaned with a Windows Registry tool (see here at section Registry Tools)