Windows 8.1 and estimating

Hi all,

I am in desperate need of upgrading my computer and I'm currently running Estimating version 9.8 Rev 3. Can I buy an windows 8.1 machine and if so, does it need to be pro or enterprise or can it be simply 8.1? or do I need to try to find a new windows 7 machine? Additionally, what is the latest version of estimating I should be downloading and installing/upgrading files to? - I'm seeing information about 12.1 and 14.11 but the downloads for 14.1 are for accounting or Accounting, document management or residential management. I'm very confused.

I am finding that navigating Sage's website is extremely difficult and information is sparse when I actually find it or I have to read 4 or 5 supplemental pages before getting to a point and then still being completely confused. A lot of question so I Thank you anyone/everyone.for your answers ahead of time.