Add new keys and their values to the registry. More information: https://learn.microsoft.com/windows-server/administration/windows-commands/reg-add.
reg add key_name
reg add key_name /v value
reg add key_name /d data
reg add key_name /t REG_SZ|MULTI_SZ|DWORD_BIG_ENDIAN|DWORD|BINARY|DWORD_LITTLE_ENDIAN|LINK|FULL_RESOURCE_DESCRIPTOR|EXPAND_SZ
reg add key_name /f