These are all operating system files that you should allow access to the internet.
svchost.exe
The Service Host Process is generic host process for services that are run from dynamic-link libraries (DLLs)
iexplore.exe
The Microsoft Internet Explorer Web Browser is used to Browse the World Wide Web through HTTP
explore.exe
The Windows Program Manager or Windows Explorer handles the Windows Graphical Shell including the Start-menu, Taskbar, Desktop and File Manager
