Frequent Failure To Shut Down?

Problem description: While not occurring all of the time, it has become apparent that if my computer experiences a long period of activity, say if I am playing on it for a number of hours for example, the system will struggle to shut down. This means that once I click the button to shut down the system can sometimes take 5-10 minutes to finally shut down. At one instance the system hung up for so long that it caused a bluescreen of death, forcing me to just kill the power to the PC.Usually however the system shuts down in seconds like normal.Attempted fixes: What have you tried to do to resolve the problem?I examined the Event Viewer and learned that during each problem event where the computer would start to hang up, leading to the shut down problems, the program "Bonjour Services" is clearly defined in long strings of errors. Wanting to make sure that this program was responsible for the problem I waited for the issue to occur again and sure enough, each time the Bonjour Services was causing the issue.

know that this program comes with iTunes (which I use) but I simply uninstalled Bonjour since I don't use any of the specific functions it uses. Well it seems the problem has not simply been fixed by uninstalling Bonjour. I am still encountering the occasional stall upon shutdown, but this time the event viewer does not show any errors regarding it. I only uninstalled Bonjour through the Add/RemovePrograms in My Computer, is it possible that there are still parts of it screwing with my computer? It can't be a coincidence since Bonjour was clearly identified with each error in the event viewer for all of the previous shutdown issues