RKill

From Bleeping Computer: RKill is a program developed at BleepingComputer.com that was originally designed for the use in our malware removal guides. It was created so that we could have an easy to use tool that kills known processes that stop the use of our normal anti-malware applications. Simple as that. Nothing fancy. Just kill known malware processes so that anti-malware programs can do their job.
So in summary, RKill just kills processes, imports a Registry file that removes incorrect file associations and fixes policies that stop us from using certain tools. Then it kills Explorer.exe so it will restart and enable some of the Registry changes. When done, RKill will then create a log listing all processes that were terminated while the program was running. Please note that this will include processes that were terminated manually by the user as well as RKill. Other than what is listed above, it does nothing else.