05-18-2016 05:35 PM
Hi Phili1 ,
Welcome to the Community Forums.
You may create your own ISO via media creation tool .
Example here for windows 8.1 guide . Activation would use the OEM embedded product key via Activation 3.0 by Microsoft .
No need to purchase any key as long as you use the same Windows version that originally came with the motherboard.
Then just go to support.lenovo.com for the drivers.
Hope this answered your query.
Update us how it goes for you.