By the way, if any of you don't know how to make 'TrustedInstaller' the owner of a file (or folder), type in 'NT SERVICE\TRUSTEDINSTALLER' (without the quotes) where/when it asks to input a user name for owner of file (or folder).
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The default owner of the DLL files which need to be replaced (dwmcore.dll + uDWM.dll) is TrustedInstaller, which is the reason for this post. I like to set the owner back to TrustedInstaller after I grant myself read/write access and/or replace (or modify) these system DLL files. Ergo, this post is for those of you who wish to change owner of, or, add read/write access to a file and/or folder using Windows Explorer to TrustedInstaller, yet, are unable to (because just typing 'TRUSTEDINSTALLER' in the input box won't work).