Follow these simple steps to upgrade to enterprise: 1. Download updown8 v1.3 here 2. Select Enterprise edition and ok button. 3. Insert Enterprise installation media and run sources\setup.exe 4. Skip updates with No thanks and Select Upgrade. Stuff required: Enterprise installation media x86 or x64 updown8 v1.3 Optional: Xdelta Patch: Convert Enterprise Eval to Enterprise x86 & x64 here Faq: Q: Will this keep my metro apps too?. A: Yes it should work. Q: Hmm windows border color is white?. A: Use high contrast theme and select aero again. Q: Why is the System32\wlms\wlms.exe still present in enterprise?. A: wlms service folder can be safely deleted as its not part of enterprise sku. Q: Can Enterprise Eval be downgraded to Core or Pro. A: Maybe haven't tried.