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File Version : 5.1.2600.0 (XPClient.010817-1148)
Description : WMILIB WMI support library Dll
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.1.2600.0
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : WmiLib.sys
File Size: 4352 byte(s) 4.256 KB
MD5 : 2f31b7f954bed437f2c75026c65caf7b
SHA1: 344471C09B0E5DD684FA2324ECAD05C79C19A031

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