This is my suggestion, go here and submit a support ticket about your concerns and hope that someone responds with an appropriate answer.  As other forum users reported, Poser 11 does operate under Windows 7.  The only drawbacks are the current Nvidia graphic cards to handle GPU rendering and enough RAM memory.  Windows 7 is not mentioned under the required operating system because no more extended Microsoft support exists.  No updates nor security leak patches.  You may have lost the opportunity to upgrade to Windows 10 for free but that's another issue.  Try the link I provided, hopefully, someone with respond in good time.  Good luck.