I have been unable to run a windows defender scan since 1/4/2018. I noticed there was an update on 1/8/2018. Is there away to re-install or repair windows defender without fresh install. I tried to download and install windows defender but was told a copy already exists.
I have Malwarebytes Pro antimalware installed and have never had an issue with it interfering with windows defender before.
[Original Title: Windows Defender for windows 10]