Are there any messages in your event viewer as to what is happening?
This was used extensively on the corporate versions, but I don't recall many users here. There are two threads from 2008-2009 but no issues reported other than it being a bit hard on system resources.
I don't see any information on it to indicate that it is still being updated or improved.
I would suggest checking your event viewer to see if any conflicts are noted under system and application. That could help. I don't know if updating the video would help because the screensaver itself seems to be relatively old.
Make sure that the program .exe's are allowed under the program rules because it updates every 12 hours, give or take, and perhaps add the program .exe to full-screen mode.
I would also recommend a visit to the corporate forums, as they do have some experience with it there. There were issues with it hanging or causing a freeze on waking up, so they may have more suggestions.