How can you safely surf at the coffee shop?

You’d like to use your laptop at the local coffee shop, but you’re concerned about the open Wi-Fi access. What Windows component can prevent others at the coffee shop from accessing your computer?

A) Anti-virus software

B) NTFS file system

C) Windows Update

D) Windows Firewall

E) Tall Caramel Macchiato with Soy Milk and Sugar-Free Vanilla