DavidR
2
I would say that is because the drive is considered removable as it is.
I guess you can install it on any drive/partition. provided that drive is internal. I don’t see that there would be much in the way of files that could be moved, not that there is a huge amount of space taken up by avast.
Currently on my HDD Program Files, avast software folder is 160MB, which isn’t excessive (even on an 8GB SSD), whilst this figure will fluctuate after updates, avast does its house keeping and cleans old virus definition update folders. So it should stay at a level over time.