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File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Description : Hardware Policy Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 6.1.7600.16385
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : hwpolicy.sys
File Size: 13904 byte(s) 13.592 KB
MD5 : 8305f33cde89ad6c7a0763ed0b5a8d42
SHA1: FAAB6D01F1E01F0D1B424ED8674766918DDC7CA7

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