I would suspect it is just based on the installed software on the machine. It's either looking for software with .net 4 in the name, or just assets with software called .net with the version that starts with 4.
I'm not sure which one of the two it is. I would just recommend taking a screenshot of the assets in that group. Take a screenshot of an asset that should be in that group (just show that Lansweeper detected .Net 4 installed) and send it to
support. This way it can get tested and fixed if it is a bug.