July 13, 2015, To whom it may concern:

For VP- 400B, 500B, 1500B, 2000B and 2500B systems:

After Windows update, Microsoft has a pop-up within Windows 7 that offers a free version 10 upgrade,
you should not download or install the new operating system.
Our software is optimized for Windows 7, and will not operate under any other version.
If this upgrade is performed it is not covered under warranty and would be a billable repair.