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File Version : 6, 17, 0, 0
Description : ZD1211B 802.11 b+g USB LAN Driver
Copyright : Copyright (C) ZyDAS Corporation 2002-2006
Product Version : 1, 2, 1, 1
Product Name : ZD1211B 802.11 b+g USB LAN Adapter
Company Name : ZyDAS Technology Corporation
Internal Name : 1211B driver
File Size: 449536 byte(s) 439.0 KB
MD5 : c32233e87e4e86b239d9f2da74c020b0
SHA1: 5873671442D6A85FB8937D834C1B2EB8EE8EF53C

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