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File version : 4, 0, 21, 0
Description : USB Modem Device Driver (MSS Ver.3)
Copyright : Copyright (c) DEVGURU 2002-2008. (
Product Version : 4, 0, 21, 0
Product Name : USB Modem Device Driver (MSS Ver.3)
Company Name : DEVGURU Co., LTD.(
Internal name : PSKYMdm.sys (AMD64 Free)
File Size: 183864 byte(s) 179.568 KB
MD5 : d3cdd68e4191972e9fa011405c167752
SHA1: 967B796A0CC2593CE9E99C3315F12DCDC9FF8ECF

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