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File Version : 5.1.2600.0 (xpclient.010817-1148)
Description : RAS Automatic Connection Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.1.2600.0
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : rasacd.sys
File Size: 8832 byte(s) 8.640 KB
MD5 : fe0d99d6f31e4fad8159f690d68ded9c
SHA1: AB474DB29198EA46F5E1C1D60B7AA215660CD563

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