Coombs' test involves taking a blood sample which is checked for the presence of antibodies which may destroy red blood cells.
You can use the HP Print and Scan Doctor to test the status of the printer spooler, print queue, device manager, and device conflicts. 1  On the desktop, double-click the HP Print and Scan Doctor icon to open the tool. 2  Click Start on the Welcome screen. 3  Select your printer, and then click Next.  Click Fix Printing.
Windows Scan app: Use this Start app to scan from most HP all-in-one printers. HP Scan & Capture app: Free from the Microsoft Store, scan photos or documents using your printer or the camera on your computer or mobile device. Go to Installing and Using HP Scan and Capture App (Windows 10) for more information.P Scan and Capture app: Free from the Microsoft Store, scan photos or documents using your printer or the camera on your computer or mobile device. Go to Installing and Using HP Scan and Capture App (Windows 10) for more information and to see if your printer is supported.