Issue with Cubase 5

Hello,

I'm having a display issue with Cubase 5.5.3. It suddenly happened as I started the computer regularly as well as I didn't previously install or upgrade anything on the software (Windows 10) or peripherally any hardware.

Its features:

Processor: Intel-core i7-2600

Memory: 8GB Kingston (correctly tested)

Screen card: NVIDIA Gforce 8400 GS (last driver updated)

Audio card: RME HDSP 9632.

Is there anyone having the same issue? Any advice to solve it?