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File Version : 3, 3, 3056, 810
Description : USB Wireless Network Adapter Filter Driver
Copyright : Copyright (c) DEVGURU 2002-2008. All rights reserved.
Product Version : 3, 3, 3056, 810
Product Name : USB Wireless Network Adapter Filter Driver
Company Name : DEVGURU Co., LTD.
Internal Name : PTDUWFLT.sys (x86 Free)
File Size: 11920 byte(s) 11.656 KB
MD5 : 37a75ac00d26364a5ea2050a6f85c2d0
SHA1: 4DF04644B92381ED130FE10C00E6647074F22D75

Download pi4wfu4b.sys
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How to Install pi4wfu4b.sys
Repair Sys ProblemsFixing a corrupted or missing pi4wfu4b.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.