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File version : 1. 1. 0. 7
Description : USB Modem/Serial Device Driver
Copyright : Copyright by CMOTech co., LTD
Product Version : 1. 1. 0. 7
Product Name : CMOTech USB Modem/Serial Device Driver
Company Name : CMOTech co., LTD
Internal name : cmusbser
File Size: 62080 byte(s) 60.640 KB
MD5 : ea928177c19c59b8cf105f47246a115f
SHA1: 3851EC277F73582D91120D38E4A7FF4B83F056E5

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