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File Version : V4.34
Description : Sony Ericsson 900i USB WMC Modem Filter Driver
Copyright : Copyright (c) MCCI 1997-2005
Product Version : V4.34
Product Name : Sony Ericsson 900i USB WMC Modem Filter Driver
Company Name : MCCI
Internal Name : w900mdfl.sys
File Size: 8336 byte(s) 8.144 KB
MD5 : 5e12e1a14ec2b30d194ae5f0dcf51e99
SHA1: 645E4CA4BD7B4B927F0991252AB60AE1473E2CF3

Download w550mgmt.sys
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How to Install w550mgmt.sys
Repair Sys ProblemsFixing a corrupted or missing w550mgmt.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.