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File Version :
Description : NDIS5 Miniport Driver for Marvell Yukon Ethernet Controller
Copyright : Copyright 2002-2006 Marvell . All rights reserved.
Product Version :
Product Name : Marvell Yukon Ethernet Controller
Company Name : Marvell
Internal Name : YK50X86.sys
File Size: 249984 byte(s) 244.128 KB
MD5 : 3bc27bad5fa38c4681fe6a5b5b556118
SHA1: 1CAA8B325A08CD99B26A27283D55DB563DEF7BF0

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