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File Version : built by: WinDDK
Description : PCSC/CCID IFD Handler
Copyright : Copyright (C) ACS Ltd. 2008
Product Version :
Product Name : ACR122 Smart Card Reader
Company Name : Advanced Card Systems Ltd.
Internal Name : acr122.sys
File Size: 36992 byte(s) 36.128 KB
MD5 : 2f64f63f107062785ba4cf41463a3d62
SHA1: 16315295030632CC21B46F9A7F8F37054AD652E8

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How to Install acr122.sys
Repair Sys ProblemsFixing a corrupted or missing acr122.sys error is an easy process with a few steps. Open the zip-file you downloaded.Extract the .sys file to a location on your computer. We recommend you to unzip the file to the directory of the program that is requesting the file.
If that doesn't work, you will have to extract the file to your system directory.
By default, this is C:/WINNT/system32/drivers (Windows NT/2000).
or C:/Windows/system32/drivers (Windows XP, Vista, 7).
Make sure overwrite any existing files (but make a backup copy of the original file)
That should be it. Although not necessary you can reboot your computer as well.