Can Hijackthis! still be found and sites that analyze the results?

Do anyone know where Hijackthis! can be found, if it is still available, or what preceded it? I know there is a smart BHO or something hiding in my bytes, when I use Google Chrome or Firefox, I cannot use the search function because instead of going to the link it goes to some other search side. Google Chrome won’t even go to Google mail with out warning it is an unsafe site and not letting the navigation to complete! I have used Hijackthis! before in the past and it worked, I would like to try that again, seeing nothing else helped so far. Where can I find it?