Ok,
the screensaver works great with Windows 7.
Installed in this this direction => [(system-drive)/Windows/System32/]
I don't know why you getting trouble with it.
Here my PC details:
---------------------------
Windows 7 professional 64bit (latest updates)
CPU: AMD 64 3200+ (2,21 Ghz) [no dual core
]
RAM: 2GB DDR1
Graphic: Nvidia GeForce 7600GT AGP (Windows driver)
classification: 4,1