I am a new member of the Community and I am a senior and not very good with computing. Today I began to set up a Canon MG6851 with my Grandson's Windows 7 laptop. I set it to function wirelessly. My Grandson still uses an old version of the program 'Publisher' which they use at his school.. I was testing out the printer performance and trying to show him how to print directly from the computer. I created a new document in Publisher and printed it no problem. I had set the Canon as the default printer in 'Devices and Printers'. However, when I tried to print a couple of older files which had previously been printed using a Samsung Mono printer, which my daughter utilises for work, the computer tried to seek connection with the Samsung, even though I still had the Canon selected as the default printer. After some time I found that I needed to go into the file menu and manually selct the Canon printer on the printer set-up sub menu option. This was confusing for me ! Why did the default printer setting not merely kick in and print from the Canon? As I say, if the document was newly created and had not been previously been printed via the Samsung then there was no issue! I assume that if the Samsung was removed from the listed devices this clash would cease? Or, perhaps the computer would continue to seek the Samsung? I am confused why this is happening. My grandson and I are both used to merely pressing print and the computer finding the default printer and executing the task without having to manually select the printer in this way. I am sure I am missing something due to my inexperience. Any help would be greatly appreciated.