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File Version : 1.00.0000.3 built by: WinDDK
Description : ATI PCI BUS MASTER IDE Controller Driver
Copyright : Copyright ATI Technologies Inc. 2000-2004
Product Version : 1.00.0000.3
Product Name : ATI PCI BUS MASTER IDE Controller Driver
Company Name : ATI Technologies Inc.
Internal Name : atiide.sys
File Size: 6016 byte(s) 5.896 KB
MD5 : 15fc040d4e946ba968ba83d49d8ad151
SHA1: DA5B561A5AFAA76F3E3494999242F816076D3376

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