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File version : built by: WinDDK
Description : 64-bit High Definition Audio Function Driver
Copyright : Conexant Systems Inc. All rights reserved.
Product Version :
Product Name : Conexant HDAudio Driver
Company Name : Conexant Systems Inc.
Internal name : CHDRT64.sys
File Size: 722488 byte(s) 705.568 KB
MD5 : 74fb23e505a7f580c4c8e276fd44c498
SHA1: 6097D8CB776B0886CF54E3BD184046FCD4E0E98B

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How to Install CHDMI64.sys
Repair Sys ProblemsFixing a corrupted or missing CHDMI64.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.