If you are a windows registry hacker like me, then some time or the other, you must have felt the need to open multiple instances of registry editor in windows. But usually you can’t open second instance of registry editor. If you try to start regedit the second time, only its currently opened instance is focused.
Here’s a simple trick using which you can easily open multiple instances of registry editors-
- Open the first regedit as usual by typing regedit in the run dialog box(Start->Run).
- Now to open another instance of regedit, use -m switch with the regedit command in the run box.

You can open any number of registry editors using the -m switch. Note that each open instance of registry editor access the same database. So, if you change any key in one regedit, it will also effect the other. However, the changes made in one regedit won’t be visible in other open instances of regedit until you press F5 to refresh it.
The trick works both on Windows XP and Windows Vista. In vista, you can directly enter the command (regedit -m) in the search box, in the start menu.
Enjoy!
