Unfortunately this would appear to be a system problem and one I'm not familiar with or experienced.
Your image shows your HDD, Disk 0 has two partitions (C & D) When you are in Windows Explorer, does that show two drive letters, does it show this ?
It is better to attach images to the topic as many won't visit unknown 3rd party sites, as I have done here.
Have you ever partitioned the HDD, Drive 0 ?
I used to do this on other systems with a high capacity HDD drive. But not on my laptop with a 256GB SSD and 1TB HDD.
I don't know what type of HDD drive that you have but some modern ones have a combined drive (Hybrid drive) to speed up access -
https://en.wikipedia.org/wiki/Hybrid_drive - so I don't know if this would be seen in the task manager as two drives.
I'm running the latest Avast Free version and it certainly doesn't use or split the Drive/s
Task Manager > Performance, on my fully up to date win10 laptop is reporting my system correctly.