Test if a registry value exists.
    Test-RegistryValue [-Key] <Object> [-Value] <Object> [[-SID] <String>] [<CommonParameters>]
    Checks a registry key path to see if it has a value with a given name. Can correctly handle cases where a value simply has an empty or null value.
    -Key <Object>
        Path of the registry key.
    -Value <Object>
        Specify the registry key value to check the existence of.
    -SID <String>
        The security identifier (SID) for a user. Specifying this parameter will convert a HKEY_CURRENT_USER registry key to the HKEY_USERS\$SID format.
        Specify this parameter from the Invoke-HKCURegistrySettingsForAllUsers function to read/edit HKCU registry settings for all users on the system.
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer, PipelineVariable, and OutVariable. For more information, see 
        about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216). 
    -------------------------- EXAMPLE 1 --------------------------
    PS C:\>Test-RegistryValue -Key 'HKLM:SYSTEM\CurrentControlSet\Control\Session Manager' -Value 'PendingFileRenameOperations'
    To see the examples, type: "get-help Test-RegistryValue -examples".
    For more information, type: "get-help Test-RegistryValue -detailed".
    For technical information, type: "get-help Test-RegistryValue -full".
    For online help, type: "get-help Test-RegistryValue -online"