What are the methods to download software for the printer?
You can download software using three methods: Method 1 is HP Easy Start from 123.hp.com/laserjet (Windows and macOS), Method 2 is from the product support website www.hp.com/support/colorljE57540mfp (Windows clients and servers), or Method 3 is the HP Universal Print Driver from hp.com/go/upd (Windows only). Choose the method that best fits your operating system and setup needs.
From the official HP Color LaserJet Managed MFP E57540 Multifunction Printer manual, page 6
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