https://community.usa.canon.com/t5/Scanners/CanoScan-5600F-External-Disc-Drive-Does-Not-Acknowledge-Software/m-p/387369#M899 <P>25.9.22</P><P>0940am</P><P>came to adding canon software to computer, (to my lenovo computer), so i could use scanner. it's an excellent scanner - no idea why you deem it unfit for purpose - but external disc drive does not now acknowledge the software or the device. no idea why. any help on this... is there something i need to do regards: configuring bus ports or computer per se? the computer allowed my adding of scanner to it a couple of months back...&nbsp; p.s failing all that do you still produce scanners which allow scanning of documents and photographic negatives - which is the selling point of this canon5600f?</P><P>regards</P><P>j sutcliffe</P> Tue, 27 Sep 2022 15:11:29 GMT jonathansutclif 2022-09-27T15:11:29Z https://community.usa.canon.com/t5/Scanners/CanoScan-5600F-External-Disc-Drive-Does-Not-Acknowledge-Software/m-p/387369#M899 <P>25.9.22</P><P>0940am</P><P>came to adding canon software to computer, (to my lenovo computer), so i could use scanner. it's an excellent scanner - no idea why you deem it unfit for purpose - but external disc drive does not now acknowledge the software or the device. no idea why. any help on this... is there something i need to do regards: configuring bus ports or computer per se? the computer allowed my adding of scanner to it a couple of months back...&nbsp; p.s failing all that do you still produce scanners which allow scanning of documents and photographic negatives - which is the selling point of this canon5600f?</P><P>regards</P><P>j sutcliffe</P> Tue, 27 Sep 2022 15:11:29 GMT https://community.usa.canon.com/t5/Scanners/CanoScan-5600F-External-Disc-Drive-Does-Not-Acknowledge-Software/m-p/387369#M899 jonathansutclif 2022-09-27T15:11:29Z