I would know how to do that manually, all you have to do is press ctrl + alt + delete.
Then click the Processes tab, then click the process that has one letter and .exe file extension.
Click that, then click the End Process button. Then click the start menu, then click Search.
Then type in the file name that I just told you about. When the file shows up, just delete it (but not the ones that don't have one letter and the file extension .exe.