Hi stumac1968,
Welcome to the MSDN forum and thank you for your sharing.
>>Today after the update, it won't connect to the port being used
by VS.
If the only change that you made to your computer and VS is installed the 1703 update, then lead to this issue, please go to Help-Send Feedback-Report a problem to raise up this
issue to the VS Product Team, and sorry for this inconvenience.
It seems your issue is solved, right? If so, could you please mark it as answer and that will help other community members who meet the same or similar issue to easier search this
useful information, thank you for your understanding.
Best regards,
Sara
MSDN Community Support Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any
compliments or complaints to MSDN Support, feel free to contact MSDNFSF@microsoft.com