This is happening to multiple drivers related to audio hardware all over the internet due to a change that Windows 8.1 has. Fix your driver, Line 6. Keep us updated like all of the other companies do with software (8.1 has been out for some time, now) or post about it somewhere so that we know you're fixing it. You have competition in the scene coming very soon from multiple companies and merchants who all have much better relationships with the recording scene than you do. This portion of your sales will go down handily if someone else makes sure they have solutions that are faster and that work. Tech is not getting less dynamic. You are far too slow for a company that makes software and sells it. Make it free if your updates are going to be this awful. This is unacceptable.