Install program for users only?

Can I install a program just for myself so that other users don't see the program? And if so, is that possible with Fortnite?

In theory, yes, if you are familiar with WINDOWS user rights.

Only briefly explained:

After installation, just put the icon on your desktop, remove the rights of the folder where the program was installed for "Everyone" and "All users" and only explicitly set your user and system as execute.