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.
From Hewlett Packard Development Company: HP Smart Print is a Google Chrome extension which saves ink and paper. HP Smart Print allows you to remove headers/footers, advertisements and leaves you with the content you want to print. HP Smart Print makes it simple by selecting the area of the website it thinks you want to print.