Looks normal.
And I have to say it's a very small chance of being infected when both MBAM and Spybot doesn't detect a malware. And infections isn't the onliest thing that can cause slowness. You can try to only run one real-time scanner(only the antivirus). Only use one firewall. One last thing, right-click recycle bin and hit "Open CCleaner". Hit "Tools" and then hit "Startup". Disable everything which is unneeded to being started up at startup. This will decrease your startup time, something which is good. An example is DaemonTools, or Steam, or Skype. Only 15 of my 40 items in my startup menu is set to "enable at startup".
Anyway, if it really bothers you (the slowness), and you can't figure out what's wrong, just defragment.