Hi and welcome to the WTT forums.
We do not analyse HJt logs in this subforum so I have edited your post and uploaded your HJT (Beta) as an attachment ( if the search engines were to find it, it might encourage other folks to post their logs in this subforum and we don't want that)
Sorry to hear of the problems with your machine.If you think its possible that you have an infected computer, its best for you to have the machine checked out by a specialist malware fighter:
Go here: for directions and follow them carefully
The malware fighters over in the Infections Removal forum are pretty busy at the moment, as the number of folks in trouble, sometimes exceeds the number of trained advisers available.
However please be assured that they will get to your post as soon as they can.
It's important that you do not send a second or "follow up" post in the Infections Removal forum until you have received a response from them there (The malware fighters look first for posts with zero response).
If you are still having issues with your machine once its been checked for malware and declared clean, please post back here in this topic and we will do our best to help.