I would like to suggest you to follow these steps to remove the virus infections from your computer.
-Download and run Junk ware removal tool and restart the computer-downloads.malwarebytes.org/file/jrt
-Run a malware scan using malware bytes anti malware-https://www.malwarebytes.org/mwb-download/
-Restart the computer
-Reset your browsers For Internet Explorer.
-Open Internet Explorer and click on tools.
-Click on Internet options and click on advanced tab.
-Click on Reset
For Google Chrome first remove the extensions.
-Open Google Chrome
-At the far right, inline with the address bar, click the Menu icon
-Click on settings and at the left side you will see extensions
-Click on extensions and click on delete for all unknown extensions.
-Then click on settings and scroll down to click on show advance settings.
-Scroll down and click on the reset option to reset chrome
For Mozilla Firefox:
-Open Mozilla Firefox
-At the top above the address right click on the grey portion and select menu bar.
-Click on help from and select troubleshoot information.
-Click on refresh Firefox and click on finish
Install ad blocker on all browsers using the link:www.adblockplus.org
-Restart the computer and check your browsers and computer now.
Hope these steps will help you to remove the virus infections from your computer and you can use your computer freely again.