ACLUI.dll is a component of Windows.
It is developed by Microsoft corporation.Aclui.dll is a security descriptor editor. It is an important system dll file, which must not be deleted.
Aucii.dll is one among the critical system files which are necessary for the operating system to function without any glitches.
That dll could be corrupted and it's crashing.
To fix it run as admin the command prompt and type sfc /scannow
If it unable to repair it the its recommended for you to do a Repair install