We have XP Mode, possible support from http://www.hamrick.com/ with Vuescan and the CODE 28 is an issue.
I've seen that on clone PCs where the user/maker/support can't install Windows properly but I don't think there is something new going on except you tried to install from that old CD and could have broken the system so Canon's note does not work anymore.
I'd start over with the OS by restoring that and then try it Canon's way.
As to the lost files, I have to ask because it's always interesting to know. Didn't anyone tell you to keep backup copies of what you can't lose?
And did drivesavers.com call it irretrievable?
We had HP Pavilion Windows XP and CanoScan FS4000US and with great difficulty and enormous labor scanned the photography for a book - thousands of pictures. The hard drive storing this material crashed and could not be recovered. So we bought a new HP with Windows 7 home premium.
We are trying to connect the CanoScan FS4000US hardware which is a pro-level scanner for slides and negatives: It was working fine on the XP HP. With original cable and software from CD, we try to install. Unfortunately the Windows software is not recognizing the device, and the CD allows us to unzip the software as if installing, but nothing autoruns, and when we search for the installed software to make it run, nothing is found except a patch which can't install because it can't find an original version to patch. We went to Canon's website to download a new version of the driver, but it says they have no new driver for this - and that the new operating systems will be able to recognize the device or won't need a driver. But when we connect it, all that shows up in Devices & Printers is "Unspecified scanner" with an exclamation point triangle that says "needs troubleshooting," and the troubleshooting goes around in circles with no results. Code 28, driver needs updating, but "update driver" button is gray, etc. The scanner also does not show up as a source within Gimp 2.8.
We also got a Mac Book Pro, OS10 version 10.7.4. It is also unable to recognize or install the same scanner. The Canon webpage for Mac says the same thing, that it has no driver for this product. What should we do?