On my computer that uses Windows 7, the screensaver only works sometimes. After it
quits working, it starts working again on its own. I set the "Turn off display" for a longer period than when the screensaver activates. I have changed screensavers thinking there may be a problem with the one I had.
First I had 3D Text, now I have Ribbons. The screensaver is set to come on after 2 minutes. I have used both wired and wireless mice.