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File version : built by: WinDDK
Description : BUFFALO Wireless Configuration Driver
Copyright : Copyright(C) 2003 MELCO INC.
Product Version :
Product Name : BUFFALO Wireless LAN
Company Name : MELCO INC.
Internal name : BWCDRV.SYS
File Size: 8704 byte(s) 8.512 KB
MD5 : 4d517df77add28abfbeffa2fde05cb47
SHA1: 94694E6D89BF43E179973CD8901BDE52A1365F4A

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