Chris clicked on a link in email and he ended up getting one window open after another. This is called a "porn storm." Leo says if he can close the browser, that should stop it. Now Chris is worried about hidden files that may be in his cache from this. Leo says that's easily fixable. The browser has a cache and it can be cleared out. In Google Chrome, select "Clear Browsing Data", and that'll wipe out everything. If he uses Chrome in "Incognito" mode, no files will be saved when he browses online.