This belongs in Computer Security board.
Secondly, download malwarebytes, spybot search and destroy, and AVG Free. Boot into safe mode (Press F8 repeatedly when the computer is booting up to launch into the boot mentu). Then run full scans on malwarebytes and AVGFree. Remove what it tells you to remove.
After that, let us know how your computer is running, and in the future please read the board descriptions to make sure you're posting in the right spot. This section is mostly for building new computers.