(http://cache.gawker.com/assets/images/lifehacker/2009/03/process_blocker.png) GoogleUpdate, ctfmon, iPodService—these rascally, auto-starting services and others like them can drive a memory-sensitive Windows user bonkers. Process Blocker does what it sounds like, with a DIY but simple method of choosing targets.
This appears to be an exciting piece of software. I am just posting the Link because there are Links for the Instructions, and other things that will asist you in determining if a process you want to Block should be blocked.
Process Blocker is a free download for 32- and 64-bit Windows systems (2000 and later).
JavaJolt
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http://lifehacker.com/5173445/