Why am I experiencing high CPU and memory utilization on my HP laptop running Windows 11?

I have an HP 15s-fq0xxx laptop with Windows 11. Task Manager shows high CPU / memory usage (upper than 80%), and I experience slow applications response times.

I reset the computer to factory default, reset MS Defender (MpCmdRun.exe -ResetPlatform), and followed the instructions in this page Clean Boot but no method was successful at resolving this problem.

Can someone help me fix the problem?

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CPU, GPU, Memory and Disk information shown here :

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