I've had work-stopping problems with malware which has been getting more severe over the past week. I have Windows XP, and use Firefox. I have my program access set to not access IE, and never open it myself, but IE keeps opening and popping up with ads now - one for making money on google, one for spyware2009, one for an online scan service supposedly provided by yahoo, and others. Now if I click to close the popup, another one apears immediately. Yesterday the computer restarted 4 times, twice while in safe mode.
I have a HiJackThis log, attached.