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File Version : 7.54.07
Description : HSP Modem Serial Device Driver for NT 5.0
Copyright : Copyright (C) PCTEL. 1994-1998
Product Version : 7.54.07
Product Name : HSP Modem Serial Device
Company Name : PCTEL, INC.
Internal Name : Ptserial.sys
File Size: 135543 byte(s) 132.375 KB
MD5 : d0175a771c697ee377da4c92392634d9
SHA1: 948269C9D605D25664458609BA4DCA090FE50A6C

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How to Install PROKDDP.SYS
Repair Sys ProblemsFixing a corrupted or missing PROKDDP.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.