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File Version : 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)
Description : RAS L2TP mini-port/call-manager driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.1.2600.2180
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : rasl2tp.sys
File Size: 51328 byte(s) 50.128 KB
MD5 : 98faeb4a4dcf812ba1c6fca4aa3e115c
SHA1: 2F256EEFE46DB4E2E43AD98F7226D1EE793B4AF6

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