Thanks, but couldn't see the option on simple file sharing - tried unticking all boxes in Windows Firewall, but hasn't helped situation - system still thinks someone else is using the printer - Cannon Pixma MG6250
above shows where this line is in Folder options, view tab.
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in task manager end process for any process dealing with your printer, if you are not sure then download process monitor , which is a more indepth version of task manager, in PM you can right click and choose to search online for any item you are not sure of: