REG IMPORT FileName /reg:32 | /reg:64 FileName The name of the disk file to import (local machine only). /reg:32 Specifies ...

REG IMPORT FileName [/reg:32 | /reg:64]

  FileName  The name of the disk file to import (local machine only).

  /reg:32  Specifies the key should be accessed using the 32-bit registry view.

  /reg:64  Specifies the key should be accessed using the 64-bit registry view.

Examples:

  REG IMPORT AppBkUp.reg
    Imports registry entries from the file AppBkUp.reg