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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: 131932 byte(s) 128.860 KB
MD5 : 72eb9f6319d523784a52369bdd73c170
SHA1: 4A4E7BB4F2FFBE57CCAF0450A664A774CE40098A

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