Canon CanoScan D646U Driver Download
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 44,091 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.
Supported Models
Canoscan D646U
CanoScan D646U
Manufacturers
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
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Related Driver Updates
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
Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.
Select the Driver tab.
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.