The most likely scenario is that you have the program running that you are trying to patch. Check the Windows Task Manager (Ctrl+Alt+Del) to make sure the process is not running.Originally Posted by monkeyman
Another possibility is the file you are patching is in Read-Only mode. Right-click the file and go to Properties. Make sure "Read-only" is unchecked.
Lastly, your virus scanner or other security software may be preventing you from overwriting this file. Try temporarily turning off this protection.
:wavey: