Excellent link from Andy James!
In the recesses of your computer, 20-30 invisible processes run silently in the background. Some hog system resources, turning your PC into a sluggish computer. Worse yet, other useless processes harbour spyware and Trojans – violating your privacy and giving hackers free reign on your computer. WWW.ProcessLibrary.com is an invaluable resource for anyone who wants to know the exact purpose of every single process