It is set to allow the advanced power management features to control the adapter.
In Device Manager, for the network adapter, Advanced, there should be a checkbox to allow advanced power management features for the adapter that you need to uncheck.
Check also in Control Panel, Advanced Power Options, for anything related to the network adapter, including indirectly any settings for hibernation. Similarly, be certain that the BIOS does not enable a sleep or hibernation mode for the adapter.