Trick:- Add Open With to all files

You can add "Open With..." to the Right click context menu of all files.This is great for when you have several programs you want to open the same file types with. I use three different 

text editors so I added it to the ".txt" key.

NOTE :- Firstly take the backup of the registry by one of these Software's 

1. Open RegEdit 

2. Go to HKEY_CLASSES_ROOT\*\Shell

3. Add a new Key named "OpenWith" by right clicking the "Shell" Key and selecting new 

4. Set the (Default) to "Op&en With..." 

5. Add a new Key named "Command" by right clicking the "OpenWith" Key and selecting new

6. Set the (Default) to "C:\Windows\rundll32.exe shell32.dll,OpenAs_RunDLL %1", 

C:\ being your Windows drive. You must enter the "OpenAs_RunDLL %1" exactly this way.