I´m very stuck trying to correctly activate my 7 ultimate x64 Oem pc, i tried it with Daz Loader v2.2.2 (says "Running in a Sandbox" error message), also tried with Microsoft Toolkit v2.5.1, i ran cmd and tried changing the product key inserting a VLK previously checked with "d-fault.nl/PIDCheck.aspx" . But there is no way i can activate it! What should i try?