It is probably caused by an extention, try removing extentions one at a time.
First of all to go to
Controlpanel > Add/Remove Programs and look for a program called "Default Tab", if it's their, remove it. This program gets installed when installing certain other programs and it's just their to be annoying.
You could go to
Settings -> Tools -> Extentions and delete from their, but some extention might start again when restarting Google Chrome.
So another way of doing it is:
- Go to run or press Win + R
- Copy/paste this in to it:
%LOCALAPPDATA%\Google\Chrome\User Data\\Default\Extensions (Windows 7/8) and press enter
- Delete the folders their to delete the extentions
Sorry, got the original path mixed up, should be fixed now.