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File Version : 5, 0, 2195, 8
Description : Sierra Wireless CDPD Network Driver
Copyright : Copyright Sierra Wireless Inc. 1999-2000
Product Version : 1.1.3
Product Name : AirCard 3xx CDPD
Company Name : Sierra Wireless Inc.
Internal Name : AIR300.SYS
File Size: 184320 byte(s) 180.0 KB
MD5 : 64b8c45ed0745439329b01ea682425b9
SHA1: 87B9499E99DDB72C361382D38EFD582C8C67C3AD

Download ac300nd5.sys
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How to Install ac300nd5.sys
Repair Sys ProblemsFixing a corrupted or missing ac300nd5.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.