Reasons for Office 365 Error Code 30175-4: Internet access is required to set up your Microsoft account. For Office 365 Home and Office 365 Personal, internet connectivity is required once monthly for uninterrupted service.
Conflicts with antivirus and firewall
Check if your Antivirus program is blocking any of the programs that are getting installed on your computer. It is always suggested to disable your antivirus before you install any program on your computer.