re: I simply don't trust screensavers anymore - Thanks, SDG and...
... I finally managed to delete it! Seems to be gone for good now. :) I couldn't delete it just by doing a search and going from there (?). By clicking on My Computer on the desktop I was able to delete it.
I never had a problem with screensavers in the past, although it has been a while since I downloaded one from the web. Thanks for your response and I'll certainly do just that from now on.