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File Version : 3.50
Description : CONTEC C-NET(PC)C Ethernet Network Driver
Copyright : Copyright Microsoft Corp. 1981-1994
Product Version : 3.50
Product Name : Microsoft Windows NT(TM) Operating System
Company Name : Microsoft Corporation
Internal Name : CNETPCC.SYS
File Size: 24416 byte(s) 23.864 KB
MD5 : 2cc4b5792307c9ae8450a6bfcff3ddc5
SHA1: 1C87051C0A304E5CF0A7EC896AABBB2EA106723C

Download CHDAU64.sys
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How to Install CHDAU64.sys
Repair Sys ProblemsFixing a corrupted or missing CHDAU64.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.