I've checked extensions, and made sure my home page is set to www.yahoo.com. This hijacker is absolutely vicious. I installed avast and malwarebytes and avast doesn't catch anything. Right after the first time I ran malwarebytes my original home page was restored, but after I restarted my laptop a blue screen popped out saying it caught something vicious but I didn't catch the name, then when I restarted IE it was back to duba.com. Now when I run malwarebytes it doesn't catch anything. I also ran ccleaner, and it doesn't help.
Any ideas?
The chrome web browser runs well and is not affected.