If you are installing it from a borrowed disc it must be the correct version. For example an OEM disc or a Retail Disc that matches the original installation. Also check that the code is correct. Notoriously B`s look like 8`s etc.
Surface Pro (2017) vs Surface Pro 4
Where HTML5 is headed next
MacBook Pro v Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.