The continual use of disks by Avast can have a negative impact on your PC’s performance. It can cause slowdowns in your applications and can even cause crashes if it is not addressed. This problem can be fixed by a variety of methods, including by running a virus scan as well as resetting virtual memory, or by performing a fresh reboot. You can also uninstall any software you don’t use and remove temporary files that consume RAM and CPU. You can either do it manually or use a software like AVG TuneUp to do it for you.
The change in the scan frequency could lower the disk usage of avast. This will stop background checking and monitoring however it will reduce avast’s high CPU usage.
If you still experience high CPU and disk usage You can upgrade the antivirus software. You can access the Avast interface by clicking the icon in the system tray or by searching for it under the Start menu entry. Then, click Menu and choose Settings from the drop-down list.
You can see the list of scans which are currently running on your PC by right-clicking a file located anywhere on the drive, and then selecting Scan using Avast in the context menu. You can then find one that is using excessive memory and deactivate it by pressing the Stop button. Then, you can look to check if the CPU or disk usage is back to normal.