I usually check the screensavers I download on
virustotal before installing... It will give you a warning if the file contains viruses (can be used for any file)
I have downloaded and installed a couple from
http://www.cepo.dk without any problems, they're free too

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Juan - Greetings, and you've reactivated a thread that is nearly 20 months old. Therefore, I'm locking this thread down as it really is not relevant anymore.
Thank You for understanding!