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I'm new to this - also a senior lady and not very technical. I have a lot of pdf files (mostly knitting patterns, lol) and up until yesterday could print any or all of them. Suddenly I cannot print any of them. I click on "print", then click on "ok", and instead of printing I am taken to "save as" menu. I can print anything else. The only thing I did to my computer yesterday was uninstall Mozilla because it was running so slow. Can anyone help me?