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File Version : 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)
Description : Windows Management Interface for ACPI
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.1.2600.2180
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : wmiacpi.sys
File Size: 8832 byte(s) 8.640 KB
MD5 : ae2c8544e747c20062db27456ea2d67a
SHA1: 5669ECDE33254E290B9956FA8A8682C52F7E78CC

Download win32k.sys
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How to Install win32k.sys
Repair Sys ProblemsFixing a corrupted or missing win32k.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.