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File Version : 1.16
Description : Intel(R) PROSet Diagnostic Driver
Copyright : Copyright (C) 1998-2000 Intel Corp. All Rights Reserved.
Product Version : 3.09
Product Name : Intel(R) PROSet
Company Name : Intel Corporation
Internal Name : PRODD.SYS
File Size: 39296 byte(s) 38.384 KB
MD5 : 27d7fd7084df8d86803746dac1a3e0ad
SHA1: 943BCDE9D35650BE3E490B7E17DEFAC2DD7390E9

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