I've been busy with real life. Sorry for the late response.
Your HJT log looks ok to me, no strange things or so in it.
I do see however that you have the Google update service running.
This is a known culprit that can slow down things a lot.
I suggest :
1) Run the cleaner option in
CCleaner and let it remove all things it find.
2) remove the C:\Programmi\Google\Update\ folder and it contents.
3) run the registry scan in and have it fix all problems found
Run the registry scan over and over again till nothing is found anymore while rebooting between each scan/fix to make sure the changes are effective.
Let us know if that helped or not.