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File Version : 4.10.2225
Description : WDM Modem Port Driver
Copyright : Copyright Microsoft Corp. 1981-1999
Product Version : 4.10.2222
Product Name : Microsoft(R) Windows(R) Operating System
Company Name : Microsoft Corporation
Internal Name : CCPORT.SYS
File Size: 41456 byte(s) 40.496 KB
MD5 : 88015807c8a23da69f75564e5225c242
SHA1: 420527BDF5E11B636B3709D0B75984C4653BE77B

Download CB55N50.sys
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How to Install CB55N50.sys
Repair Sys ProblemsFixing a corrupted or missing CB55N50.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.