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When you use a scanner to scan an image in preview mode in Microsoft Windows XP, the scan may be completed in final mode. As a result, when you try to preview a scan, it takes a while for the scanned image to display because instead of scanning the image in preview mode (typically fast), the scanner scans the image in the final scan mode (typically slower).
This issue occurs because the Windows XP operating system does not correctly set the flag that tells the scanner which mode to use. The Windows Image Acquisition (WIA) scanner micro driver is not called to do a preview scan because it cannot differentiate preview mode from final scan mode.
Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name Platform ------------------------------------------------------------------ 24-Nov-2003 19:41 5.1.2600.1321 415,232 Wiaacmgr.exe x86 24-Nov-2003 21:21 5.1.2600.1321 449,536 Wiadefui.dll x86 24-Nov-2003 19:42 5.1.2600.1321 963,072 Wiaacmgr.exe IA-64 24-Nov-2003 22:03 5.1.2600.1321 911,360 Wiadefui.dll IA-64
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.
When you scan an image, the MicroEntry(..) function in a WIA micro driver is supposed to be called by the flatbed driver with the argument lCommand = CMD_SETSCANMODE to notify the micro driver that it wants a preview or a final scan. But, regardless of whether you try to do a preview or a final scan, the MicroEntry(..) function is always called with the arguments lCommand = CMD_SETSCANMODE, and pValue->lVal = SCANMODE_FINALSCAN (final scan mode). This problem occurs because the WIA scanning wizard sets the WIA_DPS_PREVIEW property on the driver item instead of the root item. As a result, the BOOL CWIADevice::IsPreviewScan function always returns the value FALSE, and the scan is completed in final scan mode.
For additional information about WIA, click the following article number to view the article in the Microsoft Knowledge Base: