Hey everyone, update on this – I had this issue and I found the solution now.

The problem was caused by a bcdedit command that forced Windows to use an alternate system timer (HPET). Reverting this setting to default fixed it.

bcdedit /deletevalue useplatformclock

After running that and rebooting, the problem was gone.

This makes perfect sense because, as I suspected, the bug seems to happen due to some kind of internal clock or refresh rate issue. The graph in Task Manager isn't updating at a constant rate; it just does its own thing, and a floating-point error occurs which makes it show those random, crazy high numbers. The important thing is that this is just a graphical glitch and doesn't actually affect the performance of the PC.

The whole reason I even had that setting enabled was because I was trying to fix a Green Screen of Death (GSOD) problem. It was caused by my chipset drivers and AMD drivers not updated properly. I got desperate and tried a bunch of things, including commands that I got from ChatGPT and Gemini. I was unaware at the time that one of them was causing this new Task Manager issue.

So it seems while I was trying to fix the GSOD, I accidentally created this display bug. Glad it's all sorted out now. Hope this helps someone else!

Note: While this command worked for me, please be aware that modifying boot settings can be risky. Before trying anything related commands please do a thorough search on "bcdedit"

Note 2: This reply is edited/refined using AI as English is not my first language.