If you’ve changed your standard .tex file editor to Notepad2 or Notepad++, chances are that the contextual menu entry “Create New > Document file” has disappeared.
To restore it, just save the following code as a .reg file and run it (thanks to Archos alias Limneos for posting the code on a SevenForums):
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.txt]
"PerceivedType"="text"
@="txtfile"
"Content Type"="text/plain"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.txt\PersistentHandler]
@="{5e941d80-bf96-11cd-b579-08002b30bfeb}"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.txt\ShellNew]
"ItemName"=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,\
6f,00,74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,\
00,6e,00,6f,00,74,00,65,00,70,00,61,00,64,00,2e,00,65,00,78,00,65,00,2c,00,\
2d,00,34,00,37,00,30,00,00,00
"NullFile"=""
PS: in case you’re wondering what the hex code in ItemName means, it just stands for “@%SystemRoot%\system32\notepad.exe,-470”. This means that standard Windows notepad is used to create the file, but just to create it. This has no impact on the default .txt file editor and double-clicking the created file will just open it with whatever you defined as such.
