How to delete files in system32 on windows 7

This article explains how to remove files that belong to a system user.

http://www.howtogeek.com/howto/windows-vista/how-to-delete-a-system-file-in-windows-vista/

First you have to take the ownership of the file:

takeown /f C:\Windows\System32\en-US\winload.exe.mui

Then give yourself the permission to delete:

cacls C:\Windows\System32\en-US\winload.exe.mui /G username:F

Now you are able to get rid of it