Lync, in a nutshell, is another web conference, web based collaboration tool. I haven't fully known the potential of using it yet but I will definitely plan on exploring it more down the road. It seems like it is very easy to use.
Back to the issue, the "fix" isn't hard. Just "exit" your Lync, re-run your WSM and you are back in business.
You can log in back to Lync afterwards. What bothers me now is it seems like there are more of these web based tools that are conflicting each other. Steve Stafford just wrote one today about a file opening issue in Revit with i-Tunes. My wish is having the WSM as part of Revit standard tool just like anything else would fix many of these issues.