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File Version :
Description : ExtSta NDIS 6.0 driver
Copyright : Copyright 2005-2006, Tenda All Rights Reserved.
Product Version :
Product Name : Device driver for Tenda W54U 802.11 NIC
Company Name : Tenda, Inc
Internal Name : MRVW23B.SYS
File Size: 231040 byte(s) 225.640 KB
MD5 : 25e25ded52c14155dd7de8d8d1c0a23e
SHA1: 7E21EA68601D9E5398BFB0788BA64D50E04A6F50

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