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File Version :
Description : Broadcom Corporation NDIS 5.0 wireless driver
Copyright : 1998-2002, Broadcom Corporation All Rights Reserved.
Product Version :
Product Name : Broadcom 802.11 Wireless Network Adapter
Company Name : Broadcom Corporation
Internal Name : bcmwl5
File Size: 254208 byte(s) 248.256 KB
MD5 : a8be5b44170d7d1fbdb4dac89d2dacda
SHA1: 31FAE02A0543E31354424ADF419905CC434DCC3A

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