I'd suggest you check out all running processes. You could try sites like
<a href="http://www.neuber.com/taskmanager/process/index.html">http://www.neuber.com/taskmanager/process/index.html</a>
or
<a href= "http://www.liutilities.com/products/wintaskspro/processlibrary/">http://www.liutilities.com/products/wintaskspro/processlibrary/</a>