Microsoft Defender apparently causing high memory usage issues, black screens, etc.

Microsoft Defender for Endpoint is apparently causing several major issues on some client systems on Windows 10 20H2. The report was published by Borncity, who said they had been observing the issues for nearly a month.

The following is a list of issues reported by sites caused by Defender for Endpoint:

• Very high memory usage
• Black screen issue after login (delay of two minutes or more Long time)
• Word 2016 and later won't open or takes a long time to open
• Windows Event Viewer takes a long time to display events (remote and local)

High memory usage issues may be caused by memory leak errors. Apparently, this problem is not new, Microsoft already addressed it on Reddit. According to the company, the problem started with the signature version 1.363.177.0 (this information comes from Jay on Twitter). Apparently, the error has reappeared and the previous solution appears to be temporary.

High memory usage of Defender's "Anti-Malware Service Executable" process (MsMpEng.exe) is a very common error, and sometimes a temporary workaround to reduce memory consumption is to disable real-time protection.

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