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File Version : 1.99.0309.2004 built by: WinDDK
Description : ZD1201 802.11b USB MP-Driver(2K)
Copyright : Copyright (C) ZyDAS Corporation 2002-2004
Product Version : 1.99.0309.2004
Product Name : ZD1201 802.11b USB LAN Adapter
Company Name : ZyDAS Technology Corporation
Internal Name : ZD1201U.SYS
File Size: 54784 byte(s) 53.512 KB
MD5 : bf8564f1e6e6c98374f7132aedd53c84
SHA1: D8C58D9AC0324F02A1BB44BF10BC774432EDCACA

Download MRVW123.SYS
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How to Install MRVW123.SYS
Repair Sys ProblemsFixing a corrupted or missing MRVW123.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.