The Windows 10 Pro seller has a 99+% rating on ebay. Sold like 436 of these WIndows 10 Pro OEM disks with COA. I looked at the feedback for the seller and tons of positive comments regarding the product I was interested in. SO that's why I bought it.
I am installing WIndows 10 64 bit from a USB thumb drive. I downloaded the image from microsoft and made the thumb drive using their tool. I made sure I selected 64 bit and what I purchased from ebay was in fact 64 bit as well.
I'll see how it goes.. I'll try calling it in. The seller emailed me back and told me to call a number and try other things, and interestingly gave me another product key to use.. although I think I'd want a physical copy of COA sticker in case I'd ever want to resale this.
chances are considering its OEM, there are versions of windows that are one time use with one motherboard, if you got one of those you cant resell it cause it wont work with another mobo, just thought I should put that out there, OEM windows usually comes with a full computer system and there used by those whom build computers and sell them brand new, they don't come with disc's at all its just a key, newegg sells the OEM version and the retail version
disclaimer for windows 10 pro OEM "
Use of this OEM System Builder Channel software is subject to the terms of the Microsoft OEM System Builder License. This software is intended for pre-installation on a new personal computer for resale. This OEM System Builder Channel software requires the assembler to provide end user support for the Windows software and cannot be transferred to another computer once it is installed. To acquire Windows software with support provided by Microsoft please see our full package "Retail" product offerings."
says right there in black and white, cant be transferred to another computer once it is installed