To help research issues related to accessing our software, including launching our Billing Manager, Schedule Manager, and Receivables Manager installed apps, we have a custom field on Product Support tickets in Zoho Desk.
The "Operating System" field is a list of the four operating systems that we support (Windows Vista, 7, 8, and 8.1) and nine that we don't. As always, our list of minimum system requirements can be found at http://www.practiceadmin.com/products/system-requirements/
This field is optional when entering a ticket. (If we find that many tickets are helped by having this information, we will make it required.)