Last night I complained to my wife that in Windows 8 the new Metro interface is so important that Microsoft has valued it over a usable clock. So I commented that I needed to find a widget or something to fix that. She kindly tried to install something she thought was from Microsoft. It was a "clock" program from some site called thoosje that installed multiple programs and changed my home screen on IE and Firefox. I uninstalled all of it I could find. IE let me reset the home screen. Firefox needed to be reinstalled. Malwarebytes couldn't find anything nor did Windows Defender. I don't see anything I couldn't identify as native in the process list under Task Manager either.
Am I paranoid or was my reflex to call that malware appropriate? Is it all gone or is there a setting somewhere still likely to cause problems? Short of trying to forbid my wife from installing anything is there a way to stop her from installing obnoxious crap on my new build?