What is most likely the cause is that the drivers are not installed for the devices for whatever reason.
You need to install the drivers for the devices.
If you insert the Medion Recovery DVD you may be able to install the drivers from the disk, you can often do this two ways.
Navigate the disk and find the drivers folder and run the installers
In device manager, right click the problem devices, select "Update driver", and follow the wizard and point it to the relevant drivers in on the DVD.
However most usually the case is that the drivers are compressed in some form on the DVD and you can't actually get at them properly without either doing a full recovery from the DVD or booting from the DVD and running the specific recovery, it may offer you a choice to do a partial OS recovery and leave user files intact, or it may only offer a full destructive recovery back to factory settings.
I am not familiar with the Medion discs inparticular.
If there is no data on there that you need, or you can back it up, and then reinstall needed programs, I would be tempted to use the medion recovery DVD and restore it back to original factory condition, it should then install all the drivers correctly.
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