As a Microsoft Partner, we get to see new versions of Windows early (when they are in "beta") and so we've been testing our software for some while now on PCs running Windows 7.
The good news is that all of our software has operated correctly so far and although we will continue to run checks we don't anticipate any problems. This means that you can update your PCs whenever you want, confident that our software will continue to run.
If you have any particular queries or questions, please do get in touch.
More information about Windows 7 can be found on the Microsoft web site, here: http://www.microsoft.com/windows/windows-7/default.aspx