Update malwarebyte, run a complete scan, have it to fix what it find.
The hijackthis log shows several infections, I´ll therefore suggest you post a combolog.
Please download Combofix:
http://subs.geekstogo.com/ComboFix.exe
And save to the desktop.
Close all other browser windows.
Please connect all your external hard drive/flash drive before running Combofix, if you have any
Double-click on the combofix icon found on your desktop.
Please note, that once you start combofix you should not click anywhere on the combofix window as it can cause the program to stall. In fact, when combofix is running, do not touch your computer at all and just take a break as it may take a while for it to complete.
Combofix will create a logfile and display it after your computer has rebooted. Usually located in
c:\combofix.txt, please attach it to your next post