I am trying to upgrade my surface pro to win 8.1. however, it ask the product key for activation after upgraded. i searched all of the boxes come with the surface pro, and did not find any printed win 8 product key of my surface pro.. I purchased a used ms surface pro on ebay. it was delivered being factory-reset and the os is windows 8.0. when i tried to upgrade it, it asked me to input product key which i don't have. i did some research and factory-reset seems to make the product key lost. how can i upgrade it to windows 8.1? thanks. sam. Any product key finder that advertises support for windows 8 will work for either edition: windows 8 or windows 8 pro, as well as either edition of windows 8.1. install belarc advisor, following the instructions given during the installation..
Windows 8.1 product key - won't activate. windows 8.1 preview https: i've tried using a windows 8 surface pro, macbook air, and win8 laptop as the host. same result on each. thursday, july 25, 2013 9:26 pm. answers. I googled for 'drivers for surface rt only___microsoft windows rt 8 1 with office 2013 rt rtm woa english dvd-wzt'. as this the name implies the torrent has the surface rt drivers included. before you install you need to get your product key from your rt 8 installed.. I will give windows 8.1 product key , windows 8.1 professional product key free for you . you can find below : i give you trial product but once you are satisfied and you have enough money , i highly recommend you to buy windows 8 product key to support the developers ..