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File Version : 5.1.2600.2951 (xpsp_sp2_gdr.060713-0009)
Description : Reliable Multicast Transport
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.1.2600.2951
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : rmcast.sys
File Size: 202240 byte(s) 197.512 KB
MD5 : 9d54c7c15847b933e03d6e7c9307bae5
SHA1: 90128A50DE647B6B90EE49ECE69503F9662A7D24

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