Summarize this article:

Even if you don't use Internet Explorer on a regular basis, you'll still need to reset it as it is used for some Windows functions.  Open Internet Explorer. Click the Gear icon or the Tools menu. Select "Internet options". Click the Advanced tab and then the Reset... button. Check the "Delete personal settings" box and click Reset. If you use Google Chrome for web browsing, you'll want to reset it to delete any Snap.Do toolbar software. If you don't use Google Chrome, skip down to the next step.  Open Google Chrome. Click the Chrome Menu button (☰). Select "Settings". Click the "Show advanced settings..." link. Scroll to the bottom and click Reset settings. Click Reset to confirm. If you use Firefox for web browsing, you'll want to reset it to delete any Snap.Do toolbar software. If you don't use Firefox, skip down to the next step.  Open Firefox. Click the Firefox Menu button (☰). Click the Help (?) button then click "Troubleshooting information". Click Reset Firefox... and then Reset Firefox to confirm. If you use any other browsers such as Opera or Safari, reset them as well. Snap.Do will likely infect all of the browsers installed on your computer, so make sure to reset each one you.

Summary:
Reset Internet Explorer. Reset Chrome (if installed). Reset Firefox (if installed). Reset your other browsers.