Windows 10: Windows Defender 100% CPU Usage when doing full scan

Hi,As the title suggests, after 1-2 minutes of running full scan, the CPU usage spikes up and uses up all the remaining CPU. I don't remember this happening with previous full scans. at most used up 40-50% CPUI do have Malwarebyte installed and did a full scan root-kit and all and nothing showed up.I have also used powershell command "Set-MpPreference -ScanAvgLoadFactor 50" but it didnt work either.Is this normal? I don't want to run a full scan that may take 12+ hours on full CPU usage as that would probably spoil the hardware.What do I do?Specrocessor AMD Ryzen 7 3800XT 8-Core Processo

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100% CPU usage when performing a full system scan.

Hello. I decided to do a full system scan in windows defender and my CPU usage reached 100%, and my cpu gets very hot. Is it normal? The scan also scanned 1,300,000 files, but the results say that only 792,000 files were scanned.

 

Windows 10 Defender Full Virus Scan- CPU Usage 100%

High CPU usage has been encountered before: this thread (older) refers to dealing with a corrupt database file, but it's a bit long.
High CPU usage from Windows Defender

There are other such threads if you search for (e.g.)
Defender high cpu usage





In the past, sometimes it's proved necessary to exclude a folder:
High CPU usage from Windows Defender
(same thread)

 

Windows defender advanced scan extreme cpu overload

I routinely do Windows defender advanced scans. Up until about 2 weeks ago, that is.

All of a sudden the scan was completely maxing out my cpu. I wouldn't say it crashed the computer, but if I tried to do the simplest task while it was running, it rendered the machine unusable due to the draining of resources. Not to mention the scan would disappear, but was still running in the background. The only thing I could do at that point was to wait until it was done scanning, or shut down the unit

I found this thread that's about a year old, followed some of the suggestions, but nothing really helps.

I have no problem with the Quick scan.

High CPU usage when Windows Defender perform a Full Scan in Windows 10 - Microsoft Community

Windows Defender is my only virus protection, so there is nothing to create a conflict.

I put my defender installer folders in the excluded list. I changed my power settings from High Performance to Balanced.

I ran chkdsk /scan, sfc /scannow, dism /online /cleanup-image /restorehealth, and a Memory diagnostic. All normal.

Finally, I did a fresh install.

Is anybody else experiencing this?