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File Version : 7.75.00 built by: WinDDK
Description : HSF_HWAZL WDM driver
Copyright : Copyright Conexant Systems, Inc. 2008
Product Version : 7.75.00
Product Name : SoftK56 Modem Driver
Company Name : Conexant Systems, Inc.
Internal Name : HSF_HWAZL.sys
File Size: 208384 byte(s) 203.512 KB
MD5 : be2b2cf481cd61619c5efd77b4cbc445
SHA1: CF664AF8DECB77942357C3CC13B77C748A620724

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