According to Microsoft, you are infected by browser modifier which is a member of the Win32/SupTab family. It installs add-ons or extensions to your Internet browser without your permission. It also and modifies your search settings.
Usually, this threat bypasses the normal prompts or dialogs that ask for your consent to install browser extensions, toolbars, or add-ons into the Internet Explorer and Google Chrome web browsers.
It also modifies browser shortcut files. When launched using these modified shortcuts, the browsers open certain websites that you may not intend to visit.
I suggest scanning your computer with a proven antimalware solution like MalwareFox to get rid of it.