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File Version : built by: WinDDK
Description : Winbond W89C35 USB20 802.11abg Wireless LAN Adapter Driver
Copyright : Copyright (C) 2002-2004 Winbond Electronics Corp.
Product Version :
Product Name : Winbond W89C35 USB20 802.11g Wireless LAN Adapter
Company Name : Winbond Electronics Corporation
Internal Name : W35UND.SYS
File Size: 103168 byte(s) 100.768 KB
MD5 : 5394a1b7e29be25401f79f5c7eda3fd9
SHA1: E4F74D08D6672B381230D608B117F730FBBEAA7E

Download w70n51.sys
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How to Install w70n51.sys
Repair Sys ProblemsFixing a corrupted or missing w70n51.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.