High CPU activity during the most recent thread while in full screen mode.
High CPU activity during the most recent thread while in full screen mode.
Hey there, I’m facing an unusual issue. When I switch to fullscreen mode, my last Thread hits 100% usage and the whole system slows down. I also notice significant input lag on my keyboard. The strange part is that this happens even though I recently upgraded my PC—my old one had the same problem. It doesn’t seem like a hardware issue since everything else is new: CPU, GPU, RAM, storage. I suspect it might be related to software or a peripheral. I can’t pinpoint which task is consuming all the CPU power. My main concern is that this only appears when entering fullscreen on my primary screen. I’ve tried various fixes so far and would really appreciate any advice or suggestions. Have a great day!
Did you just set up Windows on the new machine? A fresh install usually means no software is running, except possibly a program for adjusting monitor settings after installation. It’s more likely a faulty display or connection, since a mouse wouldn’t cause this problem. Try showing full screen and disconnect any USB devices—if the issue persists, it points to something else.
I just installed Windows again. My monitor is brand new and my old main screen is also fresh. The second screen got a new DP cable too. I attempted to unplug everything, but it didn’t make any changes.
I checked all my tasks in ProcMon and noticed several AV Norton tasks, including the "Game Optimizer," causing issues.