You can edit the Windows Registry with the help of Console Registry Tool or reg.exe. Reg.exe is a command-line utility with which you can perform almost all the task which you otherwise can with regedit.exe.

Reg.exe can be useful when you want to quickly make a change to the Windows Registry without opening registry editor and moreover and has the additional facility of being directly usable in scripts.

To run the reg.exe, open cmd, type reg /? and hit Enter. This will show you the parameter list, syntax & the return codes.

The reg commands include:

Reg add
Reg delete
Reg compare
Reg copy
Reg export
Reg import
Reg load
Reg query
Reg restore
Reg save
Reg unload.

For instance:

To add a new subkey or entry to the registry use:

reg add