Difficulty changing Secure Logon text prompt

All this was done on Windows 7 Ultimate x64. I've been trying to get the "Press CTRL + ALT + DELETE or use the Windows Security button to <log on/unlock this computer.>" text changed.

I made a copy of the authui.dll.mui files from both System32/en-US/ and SysWOW64/en-US/ to another location. I opened them up in Resource Hacker , went to String Table/753/1033 and changed the text for items 12035 and 12036 , hit Compile Script , and then save. I then made backups of the originals, took file ownership so that I could delete them, and, finally, replaced them. To verify that this operation was successful, I opened the files, now in their respective en-US folders, back up in Resource Hacker . Each text field displays precisely what I set it to. However, when I lock the computer or log off, the text has not been changed at all. Even after a reboot, the text has not been changed. Afterwards, I went back into the en-US folders to make sure they didn't revert and found my changes in place.

I've done quite a bit of searching and no one seems to be suggesting anything beyond what I've done. I would appreciate any help with this matter. Thanks.

This is called DLL hell.

Likely your Windows is using another copy of authui.dll.mui file from C:\Windows\winsxs\ folder. I can not give you exact subfolder in your WINSXS folder, because it depends on your system situation, but you should be able to find it with simple search.