Try doing another search in the search engine in this format:
name*.*
Hopefully, it comes up with a *.scr file (screensavers extensions).
Find the one you want to delete and delete it.
If that doesn't work, try and see if there is a uninstall tool for the
screensaver. Check the Add/Remove programs from the Control Panel to
see if there are any.
Last resort, try downloading this tool I found on the Internet. I
haven't tested it so please use at your own risk.
Last word of advice, please do not download all sorts of screensavers
because many of them contain all sorts of spywares and adwares that you
probably do not want in your computer system. Good luck pal.