It looks like we have had several people on this thread on Windows Server 2012 / 2012 R2. Just a reminder that this version is approaching the end of its support per our normal lifecycle. Here are some pages with options and details: https://www.microsoft.com/en-us/sql-server/sql-server-2012-eos

https://www.microsoft.com/en-us/windows-server/extended-security-updates