Ok so I just done a clean install and all is good again. PIN is working again and all apps appear to be working correctly. I have ran these builds off the update track every time a new build has come out and every time i have had problems of some sort and had to do a clean install to correct the errors. I sure hop MS can sort these update problems out before the final release or their support section is going to get flooded with calls for help. I'm liking spartan in this build, its actually flying, the one thing i can find that needs fixing is to be able to drag a link from the favorites drop down list to the favorites bar at the top.