I'm currently running windows 8 pro with wmc which was activated using the free wmc key given back in the day(before ms patching that loophole - directly installing prowmc and entering that key) and I also have that activation backed up by using ATM. I still use that backup whenever I want to re-format my system. All I want to know from you guys is, 1. Can I upgrade to win 8.1 using the store update OR 2. Can I do a fresh installation by messing around with those token/data .dat files OR 3. Is there a way to create an iso containing those .dat files and use that iso to do a fresh install? Thanks. Any help would be grateful.