PSObjectToRegistry

Add-PSObjectToRegistry accepts one or more PSObjects from the pipeline and serializes
   their properties as registry values under a specified key path. The target path is
   always rooted under HKLM:\SOFTWARE or HKCU:\SOFTWARE.

   When multiple objects are piped in, each object is written to its own subkey. By
   default, subkeys are named numerically starting at 0. Use -UseLeadingZeros to pad
   numeric names to a consistent width, or -UseFirstPropertyAsKey to name each subkey
   after the value of the object's first property.

   When only a single object is piped in and neither -UseFirstPropertyAsKey nor
   -UseLeadingZeros is specified, properties are written directly to the target key
   with no subkey created.

   This function requires appropriate permissions to write to the target hive. Writing
   to HKLM typically requires an elevated session.