I am using windows 10 on a pc. This is in regards to adobe 2021

When I go to duplicate an object using the alt key, I get an error message saying I do not have enough memory to complete the action. I also can't use the alt key to drag things from my libraries. I do not get this message when I use ctrl C and ctrl V. I also do not get this message if I right-click on the items in my library and place them. It's only when I use the alt key function.