Installing, Before you begin, Efore – Visioneer One Touch 9420 User Manual
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5
Installing
Installation is a quick, three-step process:
1. Assemble the scanner
2. Install the software
3. Connect the scanner
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Please make sure of the following before you begin installation:
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If your computer has AntiVirus or AntiSpyware software 
running, you may see messages during installation asking you to 
allow the installation to proceed. Although the messages will 
differ based on the software your computer is running, in each 
case you should allow the installation to proceed. Alternatively, 
you can turn off the AntiVirus or AntiSpyware software before 
installing your scanner, but if you do, make sure to turn it back 
on again when installation is finished.
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If you already have a scanner connected to your computer it is 
recommended that you remove its driver program prior to 
installing your Visioneer OneTouch 9420 USB scanner. You can 
remove these programs from the Windows Add/Remove 
Programs list. Please refer to the user manual for your previous 
scanner for instructions to remove the driver and software 
applicable to that scanner.
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The information in this User’s Guide may cover software not 
provided with the scanner you purchased. Disregard any 
information about software not applicable to your scanner. 
Please visit our web site at www.visioneer.com for the latest 
software updates for your Visioneer OneTouch 9420 USB 
scanner.
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If your computer is running Windows Vista, you may see the 
Vista User Access Control screen asking you to confirm system 
changes. Click the continue button to allow the installation to 
proceed.
