Is this an Acrobat or Acrobat Reader question?
File path is C:\Users\userprofile\AppData\Local\Temp.
if this path is in a Microsoft server then you have set your printer up incorrect
if it is on a workstation i.e, w8, w8.1 or wx then the user needs admin or superuser rights to touch that file and if Adobe software was preinstalled then thats why they don't have permission by default... you could workaround it with a homegroup or new temp file location
It is Acrobat DC, not reader.
I have tested this with an admin account on W7 and W10 OS. The temporary files are still locked. Error says they are still opened in System even after closing Adobe Acrobat DC.