So, after reading a post by one guy where his fan throttling software was causing a FC4 crash, I disabled Corsair Link and ASUS AI Suite. Yours is the only recent post I have found on the subject. Did you find a solution yet? Since we are both crashing at around 80% during the co-op connect progress bar, I have to imagine we both have the same root cause. Neither of us have changed graphics cards or any other hardware in our PCs lately. Not sure what has changed since we had this working a few months ago with the 3.5.9.00 drivers. The game works perfectly fine as long as we don't attempt to connect to a friend's game. But 9/10 attempts result in the crash at exactly the same point. Twice today we actually managed to connect briefly before the crash. We tried disabling Windows Firewall, adding all recommended ports to our routers, un-linking Uplay from Steam, starting Steam as admin, exiting both Uplay and Steam after each failure, verifying game files, making sure all Uplay checkboxes that are recommended are checked/unchecked appropriately, rebooting the PCs, verifying UPnP and rebooting the routers, stopping non-essential tray apps from auto starting, etc. Then we tried 3.5.2.63, literally the oldest we could find. We downgraded to NVidia 3.5.9.00, which seemed to resolve the issue for us a few months ago. My friend and I have tried many things to resolve this.

Far cry 4 coop pc