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File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Description : RAS SSTP Miniport Call Manager
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 6.1.7600.16385
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : rassstp.sys
File Size: 75264 byte(s) 73.512 KB
MD5 : 44101f495a83ea6401d886e7fd70096b
SHA1: 07C0A6805CE811AA5DA073F8B7B629D709CFEE73

Download pxhelp20.sys
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How to Install pxhelp20.sys
Repair Sys ProblemsFixing a corrupted or missing pxhelp20.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.