Google - how do you know if you been hacked?

Download Ccleaner from www.piriform.com/

Go to en.softonic.com/windows/categories and download anything that sounds interesting.

Go to www.tucows.com/downloads and search for "maintenance" and download anything that sounds useful.

If you don't have an antivirus, go to www.avg.com/us-en/homepage and get the free one.

Anything you download, read the screens carefully to be sure you are not installing adware. Even legitimate sites send adware now.

After you have cleaned up your computer, click through the menus to see what options you have and remember where to find them if you ever want to use them. Go to google.com and search for "Windows tips" to learn a few things about your system.