I had the same issue for a couple of days. There are two things you need to do in order to fix this issue.
First is uninstall the program from your computer, using the following steps:
1)From your start menu access your control panel
2)Click on Add/Remove Programs
3)Scroll down and find the program for Mystart Incredibar (it has a similar name, but I don't know what it's called exactly)
4)Click on the program then click on the "Remove" button. Follow the steps, if any, to remove the program from the computer.
This will clear it from your computer.
Next you need to change some settings in Google Chrome that Mystart changed for you (so nice of them...) following these steps:
1)Click on the wrench on the top right corner of the browser, from here select options. This should bring up a new tab.
2)In this tab there are two things you need to change: homepage and search. To change your homepage just remove the mystart link and type in google, it should bring up google's url, select this. Now move onto the search drop menu and select google. There is no need to select anything to confirm, just close the tab and you're done.
Happened to me. I got curious on how to fix it and ended up fixing it.