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File Version : 5.00.2195.1620
Description : Serial Mouse Port Driver
Copyright : Copyright (C) Microsoft Corp. 1981-1999
Product Version : 5.00.2195.1620
Product Name : Windows (R) 2000 DDK driver
Company Name : Windows (R) 2000 DDK provider
Internal Name : sermouse.sys
File Size: 14415 byte(s) 14.79 KB
MD5 : f8ff03fb2350e87ebf6bf103fdc948e4
SHA1: EF5E8DEC105D6ED9EC72577B3DA296FEA7983B3F

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