I have just installed Windows 7 Ultimate 32 bit on my Acer Aspire 7730 laptop. It shows the printer as 'off line.' Previously it was running Vista Ultimate and connected wirelessly to my Canon Pixma MP 620 Printer/Scanner. I cannot get it to connect wirelessly with the new OS and cannot understand why. I have 2 other laptops, one with Windows XP the other with Vista Home basic - both connect to the printer without trouble. Can anyone suggest a remedy please.