Let me start with this. If you do want to get great help in these forums, always pay close attention to those error messages. Put them in "quotes" so they stand out.
I haven't had any issue with said modem/router, so I can't say that is the issue here. Also, I rarely use the Microsoft remote assistance since I consider it to be a security risk. Instead we use TightVNC when its called for.
Best of luck with your new and yet sighted errors.