Peter Hinchley

I often need to compare the values of two registry keys, typically those of different user hives. It's possible to switch back and forth between the keys, but this approach is highly ineffective when comparing a large number of values. There aren't any windowing capabilities available within the Registry Editor, and launching a second instance of regedit.exe only returns focus to the existing window.

Fortunately there is a solution, and that is to launch a second instance of the Registry Editor as follows:

regedit.exe -m

The -m argument will force another instance of regedit.exe to open in a new window. You can use this command to create as many additional Registry Editor windows as required.