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File version :
Description : ATI Unified AVStream Driver
Copyright : Copyright (C) 2004-2005 ATI Technologies Inc.
Product Version :
Product Name : ATI AVStream
Company Name : ATI Technologies Inc.
Internal name : atinavrr.sys(MV)(I)
File Size: 377472 byte(s) 368.640 KB
MD5 : 28ef18e34d1e383d130aaa4a81415cca
SHA1: E0AA85328B2FDF430349020C17A426C4F1906813

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