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File version : built by: WinDDK
Description : Direct Port IO Access
Copyright : Altium Limited 2003
Product Version :
Product Name : ALTIO
Company Name : Altium Limited
Internal name : altio.sys
File Size: 3200 byte(s) 3.128 KB
MD5 : 5e90a956526086634547bf8093feb699
SHA1: D10B7CC89CBC9DA55EBCB517B6BB8711D1126BDB

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