issue with windows security, windows security centre services and getting new updates

[Windows Server]

Hello everyone,i am having some issues with my pc.1. my windows security app is not working (always showing black blank screen whenever i open it)2. i am always getting a notification reads "turn on windows security centre services". while i click it i am getting another error message saying "windows security service can't be started".3. i am having an update pending with my windows. but i am unable to update it. it downloads fully but while installing it getting some issues and failing.can anyone give me a solution for these. i believe its all connected with each other.thank you.

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