Periodically Windows stops detecting my phone, therefore, it doesn’t sync and I can’t deploy or debug applications on it. There are a few solutions for this. The one that’s worked for me every time is simply a reboot, then reconnect the device after you log back into Windows. However, for those that a reboot doesn’t work for you might want to check out this Microsoft support article with a few more fixes (a couple manual and a couple automated with Fix It apps). You’ll want to try to reboot first before applying any of the MS patches (as it is by far the least invasive to your system).