Starting with Windows 10 you need a WIA driver for scan and imaging and Canon have not developed a WIA driver for 8400F. However you can use twain drivers developed for Windows 7 (32 and 64 bit), also in Windows 11 (64 bit only). However, new Windows...
I regurarly use 8400F in windows 10 (64bit) and even in windows 11.You need the 64 bit driver for windows 7. The driver works only with "old" application. The scanner app of Microsoft doesn't work. Corel wordperfect 2010/2011 works and you can embed ...