I've had this issue for a while now; randomly my laptop will suddenly cap CPU usage to 20% (~0.5Ghz) and stay there for minutes at a time. I only have this issue on Windows 10 as when I used Linux the issue was not prevelant. I also have found that none of my programs are the issue as even when I reformatted and created a fresh Windows install, I still encountered this issue randomly. The only useful piece of information I've found is that in Intel XTU I get notified that my laptop is Power Limit Throttling. I tried various things to fix this, followed various guides, but I still wasn't able to find a solution to the issue.
If anyone knows what this is about, PLS HELP
*Laptop is from 2016 and has not recieved any significant bios or other driver update since 2017, and this issue is relatively recent (~3 months)