Pop-Up In Yahoo Mail !!!!

Hi again !!!
This morning when i logged in my yahoo mail, my pop-up blocker blocked a pop-up. This is very unusual, as yahoo is quite a reknowned site. So, my conclusion was that , my computer is infected.
Few months ago, i had this same problem with the pop-up appearing, and i managed to fix it by running the Read And Run Procedure. But now, it seems im infected again.

I ran all the procedures from Read And Run today, but couldnt find anything. Below r my logs, please go through them and let me know what the problem is.

Thanks in advance !!!

EDIT : Couldnt attach my activescan log, so im gonna paste it here.

Code:

Incident                                                                        Status                        Location                                                                                                                                                                                                                                                        

Spyware:Cookie/Tribalfusion                                                     Not disinfected               C:\Documents and Settings\Pelle\Cookies\pelle@tribalfusion[1].txt                                                                                          

 

The remaining logs :

 

Ok thanks for the help !!
Not facing any problem so far,, so i.ll go ahead and do the Disable System Restore procedure.

Thanx again !!