I'm new to the whole PC building scene so i'm on a tight budget. I lack the money to buy a brand new Windows 10 retail. So i came across this (http://www.ebay.com/itm/WINDOWS-10-PRO-Professional-32-64-BIT-GENUINE-PRODUCT-KEY-DOWNLOAD-LINK-/263096142398?epid=809536399&hash=item3d41c08a3e:g58AAOSwuxpZbylU). It goes very cheap. But i wanna know if this can be trusted or not, i don't want anything to happen to my MB or other hardware. Thank you