Forum Discussion
Helcena
Aug 20, 2026Tin Contributor
Windows 11: Antivirus causes high CPU usage
My antivirus software is causing persistently high CPU usage, often peaking at 100% and slowing down my entire system even during idle periods. This performance hit occurs during both scheduled s...
NicholasWilliams
Aug 21, 2026Bronze Contributor
In your antivirus software settings, exclude the system folder from real-time protection scans, or switch to Windows Defender, which uses fewer system resources.