I'm a fan of the Roku 3 Screen Mirroring feature, but it stopped working recently with my Windows 8.1 Dell Laptop. Would it be possible that my Norton 360 firewall might somehow be blocking it? Windows detects the Roku, but fails to successfully connect to it when I use the Project function. The screen mirroring feature is still labelled beta, so I wouldn't be surprised if this was a result of a Roku update. My Samsung Galaxy S3 can still connect to the Roku, but I'm partial to my laptop display. Any ideas? Thanks.