apps usage keeps changing when i open task manager

i’ve been paranoid about having malware in my pc lately. one of the things i find sus is when i open task manager, the cpu drops from 70-100% to about 4-10%. other than that, i see changes in power usage from “very high” to “very low” on apps like antimalware SE, system, windows explorer, etc. i’ve full scanned my device several times now, and windows hasn’t found any threats. should i be worried about this?

submitted by /u/exelasdf
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