I know often it's fault of users mindless curiousity,but I checked plug-ins in google chrome and "add and delete apps"...it's no use.

*removed link* Simple Google search.
Edit: Don't download the cleaner tool the site is promoting, it's also a rogue. Just use it for information.
My WOT just put up huge red flag on that site so I wouldn't even use it for information.
Usually running Malwarebytes and then making clean profile to browser helps. With Chrome you can try resetting it and if it doesn't work then clean whole profile. Also check that there isn't any startup properties in browsers shortcut (right click -> properties -> remove anything that comes after *.exe)
