You would first need to make it not set to start up when Windows does, restart the computer and then try locating and uninstalling it again.
You need to make the above change in "MSConfig" (no quotes) and on the "startup" tab. Do not uncheck anything else in there unless you are completely certain it isn't needed. Otherwise you can wind up with loads of problems.
Let me first explain;
My knowlege: where do i find Start Up menu, and i need a step by step of where to enter MSConfig