Good afternoon, I am not experienced in Windows and also new to Blue Iris. I had Blue Iris 5 installed and basically working in Windows 10 Pro. A RLC-422 5MP (Reolink) was sending a first video successfully in our home network to Blue Iris. But as per today Blue Iris does to start anymore. Several times I tried to use the repair function of the installation program. Several times I uninstalled and re-installed Blue Iris (including a new boot of Windows 10 in between). But none of my measures worked, I do not get an error message, just the blue circle at the mouse pointer for a short while. It is my impression that the Blue Iris 5 program folder now shows more files than I have seen before (such as backup.reg, SumatraPDF.exe, some *.dll) , but I can not say if it is from repair actions or from re-installation. I am aware that in many to most cases the failure is in front of the PC/keyboard, but I have no idea where to continue. Your ideas are much appreciated. Sincerely, Claus