EndItAll is a small utility designed to close or kill all non-essential processes on a system.
This tool is great to use on slow computers which are slowing down your computer repair tasks. It is also great to use before a virus scan because it frees up more system resources for the scanner, and it can kill currently active viruses and trojans. Some other great uses for this application is to free up resources for high-end games or dvd burning.

A nice feature of this application is the ability to protect processes that are non-essential, but you want to keep open anyway.

Although this application is quite old (2000), reports on the official site say that it does work on Vista.

Screenshots:

Downloads:
Download from Official Site - 685kb

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