As far as I can tell, nothing out of the ordinary in the HJT log. Let's give your computer a good cleaning as see how it performs afterwords.
Download and install
Tune Up 2006 TrialClick on
Clean up & Repair. Run
TuneUp DiskCleaner. Delete all junk files. Afterwords, return to the Main Screen.
Click on
Clean up & Repair. Run
TuneUp RegistryCleaner. Fix all errors. Afterwords, return to the Main Screen.
Click on
Optimize & Improve. Run
TuneUp RegistryDefrag, which will take a few minutes and need a reboot.
After the reboot, start Tune Up again. Click on
Optimize & Improve then click on
TuneUp System Optimizer. Now click on
Accelerate downloads and Internet surfing to accelerate downloads, select the speed just above your actual connection speed, this requires a reboot.
After the reboot, start Tune Up again. Click on
Optimize & Improve then click on
TuneUp System Optimizer. In the menu to the left called "Wizards", choose
System Advisor. Note some of the advice it tells you.