I have had 4 cameras since early 2015 and have not had any problems. I did replace two of them with different focal length cameras a few years ago. I have been using Netcam Studio for live viewing and IPTimelapse for making time lapses. This morning at 5:30 I updated Windows and restarted...
Just came upon this site. I have had 4 HikVision IP cameras since 2015 that have been working just fine until this morning when all 4 quit at the same time. Trying to figure out what the problem is, lead me to this site.