A. A. Using the Windows NT Resource Kit Supplement 2 utility REG.EXE you can delete a registry value from the command line or batch file, e.g.
reg delete HKLM\Software\test
Would delete the HKEY_LOCAL_MACHINE\Software\test value. When you enter the command you will be prompted if you really want to delete, enter Y. To avoid the confirmation add /force to the command, e.g.
reg delete HKLM\Software\test /force
A full list of the codes to be used with REG DELETE are as follows:
To delete a entry on a remote machine add the name of the machine, \\<machine name>, e.g.
reg delete HKLM\Software\test \\johnpc