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File version :
Description : ATI WDM Teletext Decoder
Copyright : Copyright (C) 2002 ATI Technologies Inc.
Product Version :
Product Name : ATI WDM Teletext Decoder
Company Name : ATI Technologies Inc.
Internal name : AtiVTTxx.sys
File Size: 13824 byte(s) 13.512 KB
MD5 : bc9b1e1be1644a32105db453ca3c7b47
SHA1: 0E014A616C0E824A83332F09D8F95370AB63F309

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