I have successfully edited the "winlogon.exe.mui" file through ResourceHacker software. But when I was trying to copy it back to overwrite the original "winlogon.exe.mui" file in ...Windows/system32/en-US, I received an error right after the UAC permission. It says: "access denied."

I am on an administrative account, and I still receive that error. That's because I don't have ownership and permission over that folder to make changes to that folder(?).


I want to change the Windows Logon and Logoff text, and that is the reason I am in need to copy and replace the file.

Q1 - If that is the case, how do I get that ownership and permission to copy the file?

Q2 - Is it safe to change permission and ownership?

both the questions above are related.

  • Did you try to change the permission and after to restore them? Consider that you can always start with a pen drive Linux system, modify the files and start again with Windows... This always if there is not a checksum check on the files you are going to modify... – Hastur Dec 18 '15 at 10:45
  • I am not restoring them. I copied the Original file. Edited it. Tried to copy it back to the same place, but got the "access denied" error. @Hastur – 4-K Dec 18 '15 at 11:14
  • I didn't change the permission. That is my question. How do I? and is it safe? @Hastur – 4-K Dec 18 '15 at 11:14
  • I cannot answer you about the safeness of each modification you can do on files that are supposed to be not modifiable. In general it is expected that to change a string in the welcome it will be not a problem. Backup your data and do your attempt. To change permission you can see the technet itself. :-) – Hastur Dec 18 '15 at 11:19
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    You can read here. It seems it is not so difficult or dangerous. I can suggest you to try even instead of "Welcome" a more friendly "Go Away" (same length) :-) – Hastur Dec 18 '15 at 11:33

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