Processes that can be eliminated are those that are not currently used by both the user and operating system. Some processes are vital for the smooth running of the operating system and these shouldn't be killed as they can cause the computer to malfunction.
The task manager can be accessed by clicking “Ctrl” + “Alt”+ “Del.” This lists and manages all the processes running on the computer, both the important and unnecessary. Before ending a process, it’s essential to understand what exactly the process does, and a good site to enquire is ProcessLibrary.
Quickstarters are processes that keep some parts of a program loaded for quicker launching when needed. They can be terminated, especially if the program preloaded is not in use, such as the jqs.exe for java software. Other processes constantly check for updates to particular programs, such as AdobeARM.exe. These can also be ended if one prefers checking for updates manually.
Some Windows processes run automatically and may not be connected to any program. Rather, they offer features to the operating system. These are the processes that can be dangerous to kill, such as the 'svchost.exe' that runs service dlls. However, others like Sidebar.exe, which maintains widgets, could be killed safely when its features are not in use.