[war59312]

Same here.

Be sure to export your notepad2 settings.

[HKEY_CURRENT_USER\Software\Notepad2]

And this:

Code:

;Notepad2 As Default HTML Editor
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Default HTML Editor]
"Description"="Notepad2"

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Default HTML Editor\shell\edit]
"@"="&Edit"

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command]
"@"="C:\\winnt\\notepad2.exe"

;Open Unknow Files With NotePad2
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.]
"Application"="Notepad2"

;Edit INI Files With Notepad2
[HKEY_CLASSES_ROOT\inifile\shell\open\command]
@=hex(2):43,00,3a,00,5c,00,5c,00,77,00,69,00,6e,00,6e,00,74,00,5c,00,5c,00,6e,\
  00,6f,00,74,00,65,00,70,00,61,00,64,00,32,00,2e,00,65,00,78,00,65,00,20,00,\
  25,00,31,00,00,00
  
;Edit INF Files With Notepad2
[HKEY_CLASSES_ROOT\inffile\shell\open\command]
@=hex(2):43,00,3a,00,5c,00,5c,00,77,00,69,00,6e,00,6e,00,74,00,5c,00,5c,00,6e,\
  00,6f,00,74,00,65,00,70,00,61,00,64,00,32,00,2e,00,65,00,78,00,65,00,20,00,\
  25,00,31,00,00,00

;Edit CMD Files With Notepad2
[HKEY_CLASSES_ROOT\cmdfile\shell\edit\command]
@=hex(2):43,00,3a,00,5c,00,5c,00,77,00,69,00,6e,00,6e,00,74,00,5c,00,5c,00,6e,\
  00,6f,00,74,00,65,00,70,00,61,00,64,00,32,00,2e,00,65,00,78,00,65,00,20,00,\
  25,00,31,00,00,00

;Edit Batch Files With Notepad2
[HKEY_CLASSES_ROOT\batfile\shell\edit\command]
@=hex(2):43,00,3a,00,5c,00,5c,00,77,00,69,00,6e,00,6e,00,74,00,5c,00,5c,00,6e,\
  00,6f,00,74,00,65,00,70,00,61,00,64,00,32,00,2e,00,65,00,78,00,65,00,20,00,\
  25,00,31,00,00,00

;Edit Registry Files With Notepad2
[HKEY_CLASSES_ROOT\regfile\shell\edit\command]
@=hex(2):43,00,3a,00,5c,00,5c,00,77,00,69,00,6e,00,6e,00,74,00,5c,00,5c,00,6e,\
  00,6f,00,74,00,65,00,70,00,61,00,64,00,32,00,2e,00,65,00,78,00,65,00,20,00,\
  25,00,31,00,00,00

;Notepad2 As Default HTML Editor
[HKEY_CLASSES_ROOT\htmlfile\shell\Edit\command]
@="\"C:\\winnt\\notepad2.exe\" \"%1\""

;Notepad2 As Default IE Source Viewer
[HKEY_CLASSES_ROOT\.htm\OpenWithList\notepad2]

[HKEY_CLASSES_ROOT\.htm\OpenWithList\notepad2\shell]

[HKEY_CLASSES_ROOT\.htm\OpenWithList\notepad2\shell\edit]

[HKEY_CLASSES_ROOT\.htm\OpenWithList\notepad2\shell\edit\command]
@="\"C:\\winnt\\notepad2.exe\" \"%1\""

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\View Source Editor]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\View Source Editor\Editor Name]
@="C:\\winnt\\notepad2.exe"

;Open Unknow Files With NotePad2
[HKEY_CLASSES_ROOT\*\shell]

[HKEY_CLASSES_ROOT\*\shell\open]
@="Open With Notepad2"

[HKEY_CLASSES_ROOT\*\shell\open\command]
@="notepad2.exe %1"