When you enter an invalid coupon code during an online transaction, the following scenarios may occur: 1. Error message 2. No discount applied 3. Limited attempts 4. Customer support In summary, entering an invalid coupon code may result in an error message, no discount being applied, limited attempts to enter a code, and the need for customer support assistance.
Using multiple user accounts on an Apple computer allows for privacy, security, customization, and parental controls. To set up additional user accounts, open System Preferences, click on Users & Groups, unlock the preferences pane, add a new user account, customize it, and repeat for each additional user. Switching between accounts can be done through the Apple menu by selecting "Log Out" or "Switch User."
Securing a wireless network involves changing the default administrator password, using WPA2 encryption, enabling network encryption, using a firewall, and updating firmware regularly.