This will allow me to find drivers for you and know more about your situation.
I am assuming Windows 7 Delux is the same thing as 7 Ultimate, just translated differently. I also need to know the version, whether it is 32bit or 64bit.
To enable the screensaver, go to control panel>Appearance and Personalization and click "Change screen saver". Select your screensaver and the time you will wait for it to display.
This is mine with screensaver turned off:
My Computer
At a glance
Microsoft Windows 8.1 Pro 64-bitIntel(R) Core(TM) i3-4130 CPU @ 3.40GHz8.00 GBNone