Canon CanoScan D646U Driver Download

Canon Drivers

The CanoScan D646U is a scanner manufactured by Canon. Problems such as scanner won't scan, cannot scan multiple images, bad connection or no access to the Automatic Document Feeder can be fixed by keeping your scanner driver up to date. This driver - "d646U.exe" - has been downloaded 44,087 times and is rated 5 out of 5 stars based on 224 reviews. Visitors have successfully installed this driver on PCs running Windows 7, Windows Vista and Windows XP. The total disk space used for this update is 3.6 MB.

224 Ratings (see all reviews)

Supported Models

Canoscan D646U

CanoScan D646U



Supported Operating Systems

Windows XP

File Name

Additional Notes

Windows 98SE, ME, 2000, & XP driver for the Canoscan D646U scanner.

This is a self extracting file that will write the files to a folder on your hard driver named "D646U" when you double-click it in Windows Explorer then click the UNZIP button. See the readme.txt file for explanation of files. One is the driver file (S1a5_enx.exe) and the other (S1ab_en.exe) is a utility to uninstall driver files.

Uploaded By

Jerry K (DG Staff Member) on 9-Mar-2002

Most Helpful Reviews

8 of 9 people found the following review helpful:
danilo dauz

4 May 2007

Installation:  out of 5
Stability:  out of 5
Compatibility:  out of 5
"helps a lot. thank you"
Was this review helpful? Yes, it was helpful No, it was not helpful (Report this)

Already tried it? Give your review.

See all Canon CanoScan D646U ratings and reviews

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
S1a5_enx.exe 3.7 MB 9 Mar 2002
S1a5_enx.exe/D064U.CAT 16.4 KB 13 Jun 2001
S1a5_enx.exe/D064U.INF 6.1 KB 25 Sep 2001
S1a5_enx.exe/D064UNT.CAT 16.1 KB 27 Sep 2001
S1a5_enx.exe/D064USG/CANOIT32.EXE 45.1 KB 18 Feb 2000
S1a5_enx.exe/D064USG/CISDS.DS 94.3 KB 30 Mar 2001
S1a5_enx.exe/D064USG/CNS60N.ICC 55.5 KB 21 Jan 2001
S1a5_enx.exe/D064USG/CNZ005.ICC 1.0 KB 27 May 1999
S1a5_enx.exe/D064USG/CSUI.CNT 1.6 KB 4 Jan 2001
S1a5_enx.exe/D064USG/CSUI.DLL 807.0 KB 30 Mar 2001
S1a5_enx.exe/D064USG/D064UA.DAT 393.3 KB 19 Jan 2001
S1a5_enx.exe/D064USG/D064UCPL.DLL 28.7 KB 30 Mar 2001
S1a5_enx.exe/D064USG/D064UFW.DLL 151.6 KB 25 Sep 2001
S1a5_enx.exe/D064USG/D064UFW.INI 1.9 KB 6 Feb 2001
S1a5_enx.exe/D064USG/D064UFW.PLG 98.3 KB 15 Jan 2001
S1a5_enx.exe/D064USG/D064UUD.DLL 94.2 KB 30 Mar 2001
S1a5_enx.exe/D064USG/D064UUI.DLL 159.8 KB 30 Mar 2001
S1a5_enx.exe/D064USG/IMGENH.DLL 176.2 KB 30 Mar 2001
S1a5_enx.exe/D064USG/IOP.DLL 2.4 MB 30 Mar 2001
S1a5_enx.exe/D064USG/ITLIB32.DLL 119.8 KB 18 Feb 2000
S1a5_enx.exe/D064USG/LTKRN10N.DLL 298.0 KB 18 Feb 2000
S1a5_enx.exe/D064USG/MSVCRT.DLL 266.3 KB 14 Apr 2000
S1a5_enx.exe/D064USG/README.TXT 3.2 KB 25 Sep 2001
S1a5_enx.exe/D064USG/SCANINTF.DLL 1.4 MB 30 Mar 2001
S1a5_enx.exe/D064USG/SYSERROR.EXE 49.2 KB 30 Mar 2001
S1a5_enx.exe/D064USG/TPM.DLL 172.1 KB 30 Mar 2001
S1a5_enx.exe/D064USG/TWAIN.DLL 87.4 KB 11 Feb 1997
S1a5_enx.exe/D064USG/TWAIN_32.DLL 77.3 KB 17 Oct 2000
S1a5_enx.exe/D064USG/TWUNK_16.EXE 48.6 KB 17 Oct 2000
S1a5_enx.exe/D064USG/TWUNK_32.EXE 69.6 KB 17 Oct 2000
S1a5_enx.exe/D064USG/UCS32P.DLL 323.6 KB 12 Oct 2000
S1ab_en.exe 44.2 KB 9 Mar 2002
S1ab_en.exe/Deldrv.exe 73.7 KB 24 Oct 2001
readme.txt 403 bytes 9 Mar 2002

How to Update CanoScan D646U Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the CanoScan D646U driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Canon CanoScan D646U into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Canon Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

To find the newest driver, you may need to visit the Canon website. Most major device manufacturers update their drivers regularly.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

This website is not affiliated with Canon. All company names/logos are properties of their owners.
server: web1, load: 0.77