i see what your problem is.
go to start / run menu
type
cmd (then press enter)
when the cmd prompt opens (likely c:\windows) type this exactly
del c:\windows\system32\msconfig.exe
exit (making sure it did delete it)
be very careful to type exactly that and nothing else, it should allow you to delete that file, if not boot into safe mode and do it from there.
Or browse to c:\windows\system32\ and delete the msconfig.exe file, that'll probably be a lot easier and safer
