As Pfeil had indicated, that option is directly tied to registry changes. Unfortunately, VA is not indicating that an error is occurring while setting the value in your registry. Why the registry cannot be updated is something that will need to be sorted out before the value can be written.
Are you having trouble with recognition? If not, this setting will not provide any benefit. If so, and you cannot edit your registry, you'll want to find out what application is interfering - normally Nahimic would be a usual culprit.
On a side note, I've received your support email regarding this- I'll continue here.