Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Applications\notepad.exe]
"NoOpenWith"=""

[-HKEY_CLASSES_ROOT\txtfilelegacy\DefaultIcon]

[-HKEY_CLASSES_ROOT\txtfilelegacy\shell\open]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\notepad.exe]
"UseFilter"=dword:00000001