It's happening on multiple ones, but not every game has the same issue. For instance OpenTTD doesn't give the issues I described, but when I launch StarCraft: Brood War or Rainbow Six Siege (especially the latter is making it go bonkers to 100%) the whole CPU & GPU usage skyrockets on Task Manager
and strangely enough it doesn't impact anything and everything handles fine... that or it has been doing this for ages and I could get better performance oof
In this instance, I would uninstall games you know for sure have the issue, making sure that all data is removed, then reinstall. If the problem does not go away, then run an elevated command prompt (Windows key + R), type cmd, then press Enter while holding down Control and Shift at the same time. From there, type sfc /scannow and that checks to see if any bits of your Windows install have become corrupt.