I have only been using TeamViewer for a few weeks and up until the last few days, it has worked perfectly. However, it has stopped recognizing one of my PCs as being online. For example, when I am running TeamViewer (like literally looking in the TeamViewer app on that computer) it says it is offline. My other computer works just fine. In fact, I can even connect to PC2 from PC1 but not from PC1 to PC2. I have tried uninstalling and reinstalling on both machines as well as restarting. So far, nothing has worked.