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Note: From May 1, 2024, the HP Scan and Capture app will no longer be available (retired) in the Microsoft Store and HP will not release any further app updates. Alternatively, you can download HP Smart from the Microsoft Store. For more information on how to set up your printer using the HP Smart app, go to HP printer setup (HP Smart app).
Common problems HP Solution Center not working : Adobe Flash Player Error and Unable to scan
We would like to share some of the most frequently asked questions about HP Solution Center not working : Adobe Flash Player Error and Unable to Scan.
HP Recommended
HP LaserJet Pro MFP M428dw
macOS 10.14 Mojave

Suddenly, the scanner of our M428 no longer works. We used it less than a week ago. But now we only get "The scanner is busy", when using Open Scanner… from Printers & Scanners in System Preferences, or "The scanner is being used by a remote user" when using HP Easy Scan (version 1.10.0). This happens from multiple (Mac) computers.

Power cycle on printer didn't help. Printer firmware is up to date. Printer prints properly. Its web page is functional.

I run macOS (10.14.6 on my MacBook Pro). Drivers are up to date.

Any idea how this happened?

Any idea how to fix this?

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