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File Version : 1, 0, 0, 0
Description : I/O Interface driver file
Copyright : Copyright (c) 2002-2003 BIOSTAR Group
Product Version : 1, 0, 0, 0
Product Name : BIOSTAR I/O driver fle
Company Name : BIOSTAR Group
Internal Name : I/O driver
File Size: 13696 byte(s) 13.384 KB
MD5 : be5d50529799b9bab6be879ec768b6cf
SHA1: 8B5350CA00576E60017BAF2F27B5BF22EE34EFB9

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