Ashish has already posted about some Process monitoring applications, YAPM and Process Explorer. Here is a simple online tool, using which you can know what particular process running your Windows PC is all about.
You can simply type in the name of process in the search engine like interface of File Inspect Library, and it will tell you about the process.
There is also an option to browse the processes by Alphabets.
So, if you too get stuck by the name of processes and want to know what is it all about, go ahead and find it out now with this awesome online tool. Its a handy way to find about a program in case your anti virus detects any program a virus.