|There's probably an entry for WinMaximiser in your Startup items (those items which always start when Windows starts). You need to delete that entry.|
Easiest way is to download and install "Ccleaner" from here: http://www.filehippo.com/download_c...
When installed, open it.
Click "Tools" in the left pane.
Click "Startup" in the adjacent pane.
Look for a line which contains WinMaximizer.