The main problem I'm able to see in your log-file is two active antiviruses in your system. Two active antiviruses could slow your system or even cause its crash. So I suggest you to uninstall one of them as soon as possible or at least disable real-time protection at one of them. Then, execute the script:
After restart, upload quarantine of antiviral tool using this link - http://virusinfo.info/upload_virus_eng.php?tid=48295. You may as well upload an example of one of infected files there, but place it into archive with password "virus" (without quotes) first. After that, repeat your logs (you'd better make 3 logs - 2 of AVZ tool and one of Hijackthis - as it's described in the rules of "Help me" section) and attach them to your new post here.
QuarantineFile('C:\Program Files\Perfect Optimizer\PerfectOptimizer.exe','');
By the way, I can see mail.ru agent in your logs. Do you speak russian? If so, you'd better place your request in the russian section of the conference - you'll get answers much faster.