First, download the file. Then copy aclui.dll in the correct directory. DLL file you want to copy in one of the following directories:
How to download free aclui.dll?
Windows 7, Vista, XP c: \ windows \ system32 \
Windows 2000, NT c: \ winnt \ system32 \
Windows 95,98, Me c: \ windows \ system \
Before you overwrite an existing file, we recommend that you make a copy. After rewriting, you may need to reboot your computer.