Do you have synch enabled as it may be that it is downloading the bad stuff as soon as you sign in
How to disable and delete synch data
http://www.howtogeek.com/103655/how-to-delete-your-google-chrome-browser-sync-data/Re-install Chrome1. If you have bookmarks, let's save them by exporting them -
Export Bookmarks2. Then I need you to go
Google Sync and sign into your account
3. Scroll down until you see the
"Stop and Clear" button and click on the button. At the prompt click on
"Ok"4. Now we need to uninstall chrome.
Note: When asked about user data or settings you must remove this also so please check the box.
5. Restart the computer and reinstall chrome, You can download The latest version from here -
Google Chrome6. Import your bookmarks back into Chrome
7. Sign back in to your Chrome browser so that your bookmarks sync with your online account.