I have activated a WIndows 8.1 Upgrade with KMS Spico process of resetting every six month and running the tool again. Now I have access to OEM Keys from ebay for cheap $5 and I would give them a try. I will uninstall the current windows 8.1 key (using cmd) and would use the new key to activate the license. All I need to know is that whether the KMS Spico has done some modifications to the windows that would not allow a genuine key to work during the activation process or not. Thanks!