Try a simple hello world in C++ and almost all virus scanners may flag that. Talk about overly protective.
Using nsis installer is very common with developers. Having mcafee on the same computer is very disturbing because mcafee detects official nsis installer as a possible threat and gives a lot of alerts. you can see virus total analysis
Also I found many similar threads on community of mcafee. However I would like to know if there are any other developers who face the same problem as I am