Brother HL 5370DW - Manual (Page 40)

Wireless configuration for Windows ® using the Brother automatic installer application (For HL-5370DW)
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If you are using Windows
®
Firewall or a firewall function of anti-spyware or antivirus applications,
temporarily disable them. Once you are sure that you can print, configure the software settings following
the instructions.
You need to temporarily use an Ethernet cable during configuration.