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File Version : 3.4
Description : Keyspan USB Serial Adapter - Serial Driver
Copyright : Copyright 2003
Product Version : 3.4
Product Name : Keyspan USB Serial Adapter
Company Name : Keyspan
Internal Name : USA19H
File Size: 44928 byte(s) 43.896 KB
MD5 : 83224ee0942360255e82a21c80e1d4df
SHA1: C627413765BB211891313CAC9AB9CE8C54DA93B2

Download U81xcmnt.sys
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How to Install U81xcmnt.sys
Repair Sys ProblemsFixing a corrupted or missing U81xcmnt.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.