I had the same problem. When you see the screen flicker, you have to go to safe mode and use DDU (Display Driver Uninstaller). After uninstalling your drivers, install the ones provided by Medion after which install the new ones (do not check the box to do a clean driver installation in the intel menu). I solved it this way without screen flickering and the latest intel drivers. I also checked in windows device manager and the latest drivers are reported.
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