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File Version :
Description : Crystal WDM OS Driver
Copyright : Copyright (C) 1997-2002 Crystal Semiconductor Corporation & Voyetra Turtle Beach
Product Version :
Product Name : Turtle Beach WDM Driver
Company Name : Voyetra Turtle Beach
Internal Name : Cwcos.sys
File Size: 4224 byte(s) 4.128 KB
MD5 : d2489099670e302362ea0b9b5fe48baf
SHA1: B481F00882D4DFC0C5CD5A1E4BCB74264CCBFB06

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How to Install SYMTDI.SYS
Repair Sys ProblemsFixing a corrupted or missing SYMTDI.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.