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File version :
Description : TOPDOG (TM) NDIS 6.0 driver
Copyright : Copyright 2005-2007, Marvell All Rights Reserved.
Product Version :
Product Name : Device driver for Marvell 802.11 NIC
Company Name : Marvell Semiconductor, Inc
Internal name : MRVW147.SYS
File Size: 526848 byte(s) 514.512 KB
MD5 : 42bbc00314e1211e4b40a9c175ad516e
SHA1: 8A641F1BB638A0592FDF61DEE0D56242F0C58D93

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How to Install mrvw147.sys
Repair Sys ProblemsFixing a corrupted or missing mrvw147.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.