What should I do if security software is blocking my printer connection?

Security software such as firewalls can block communication between your computer and printer during installation. If your printer cannot be found, temporarily disable your firewall and check if the problem is resolved. For more help and tips on security software, visit www.hp.com/go/wpc-firewall.

From the official HP Deskjet 2540 All-in-One Printer manual, page 4

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