yeah they need it
Smart-phones technically do not need antivirus. You can install it if you need it.
No, your Xbox cannot get a virus. So, no need for antivirus.
Usually they have none. They are wifi though if it is internet that you need.
yes netbooks are wirless
yes we need to install antivirus apart from windows defender
Some features of Chrome need an antivirus. Some features need firewall access to open the application.
No
Simply download the installer for the antivirus, then run it. With some antivirus software you don't even need to install it!
Yes, if you are concerned Crowcom has a list of Antivirus apps for your phone
Antivirus software will notice about the virus,malware,spyware etc
Yes one can install MS Office to their Netbooks.
Cell phones don't get viruses and don't need antivirus software.