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File Version : V4.34
Description : Sony Ericsson Z550 USB WMC Modem WDM Driver
Copyright : Copyright (c) MCCI 1997-2005
Product Version : V4.34
Product Name : Sony Ericsson Z550 USB WMC Data Modem
Company Name : MCCI
Internal Name : Z550mdm.sys
File Size: 96352 byte(s) 94.96 KB
MD5 : d7bb454193eafa985ed30f06d9ab0101
SHA1: A7BD59A270CEA78845175531792516A24C463FF9

Download ZD11U64.sys
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How to Install ZD11U64.sys
Repair Sys ProblemsFixing a corrupted or missing ZD11U64.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.