Back up Internet Explorer 10 Search Providers

Even though this article was originally written for Internet Explorer 7, it still applies today for Internet Explorer 10 (running on Windows 8):

http://www.howtogeek.com/howto/windows-vista/backup-internet-explorer-7-search-providers-list/

You basically have to open regedit and look for this registry key:

HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes