I just got the same problem installing under Windows 10 and Kaspersky Internet Security. I appreciate your point that it's just a false positive so I ought to disable the software or exclude the install file, but I've never had this problem with any other software, nor did I get the problem all the years I used Cache and other InterSystems before I retired. There must be a way to check your software for virus signature artifacts and remove them at compilation. Leaving them in is easier for you but I don't think I'll bother with the installation, which is a shame as I have more than 20 years' experience with MUMPS and Caché and used to work for InterSystems (give my regards to anyone at the Windsor/Eton office who may remember me). But I won't be installing Iris as long as Kaspersky kicks up a fuss.