Backweb lite is a program for checking or updating, if you don't want to delete it (I would delete it) you can tell ewido not to, or at worst put it in quaranteen then restore it I can't see how Windows Defender asks you if it,s OK to run Ewido.
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Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.