Why are there so many registry changes and other internal OS mods when installing?

I have spyware detection software (SpyShelterPremium) on my Windows 10 PC. And I just installed Kaspersky. When I just installed the 1.1.0 Mainnet software, I must have had to answer 30 times or more that this software is okay. Why does Daedalus Mainnet software have to make so many deep OS changes? I admit that it causes me some security concerns.

Thanks, Marti