This will allow you update directly from 10056 (leaked build) to 10061 (official build). [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsSelfHost\Applicability] "BranchName"="fbl_impressive" "ThresholdRiskLevel"="low" "Ring"="WIF" "ThresholdInternal"=dword:00000000 "ThresholdOptedin"=dword:00000001
well obviously that did occur to me , but since the OP had formulated the string name wrong I did a key search instead and just needed to add the line: "ThresholdInternal"=dword:00000000
Seems to be updating fine for me here without any need for tinkering with the registry ?! This is 64 bit 10056 up to 10061 on my old Acer Iconia W500 tablet in case anyone was wondering ... fbl-impressive Professional 10061