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File Version : 5.00.2195.1
Description : Disk Performance Driver
Copyright : Copyright (C) Microsoft Corp. 1981-1999
Product Version : 5.00.2195.1
Product Name : Windows (R) 2000 DDK driver
Company Name : Windows (R) 2000 DDK provider
Internal Name : diskperf.sys
File Size: 22995 byte(s) 22.467 KB
MD5 : 6e0c8771c02c23f56a607acc1b5666d5
SHA1: 27A1E0134356012FAD4A3ABD96BFB77AE9A90713

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