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File version : built by: WinDDK
Description : Card Reader WDM driver
Copyright : Copyright (C) VIA Technologies, Inc.
Product Version :
Product Name : VIA Card Reader Host Controller
Company Name : VIA Technologies, Inc.
Internal name : VIACR.SYS
File Size: 59392 byte(s) 58.0 KB
MD5 : 585d6a108b0101ce8aa7df648cf43d33
SHA1: 5698A8E217B246895D61DE48AD7A76E3E9AC8E1D

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How to Install viacr.sys
Repair Sys ProblemsFixing a corrupted or missing viacr.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.