From looking at the log you attached, you have a LOT of keygens and activators on there. Those may be causing problems.
You really need another antivirus program besides MS Security Essentials. Download the free version of AVG AntiVirus or Avira Antivirus.
You can download Avira Free
HERE
You can download AVG Free
HERE
Are you running a firewall also? You should, even though the Windows 7 firewall does a fairly decent job, third-party firewalls are even better.
You can download Outpost Firewall Free
HERE