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File Version :
Description : BJ Printer Port Driver Cnmpar21
Copyright : Copyright CANON INC. 1999-2000 All Rights Reserved
Product Version :
Product Name : Canon BJ Raster Printer Driver for Windows NT4.0
Company Name : CANON INC.
Internal Name : CNMPAR21.SYS
File Size: 15300 byte(s) 14.964 KB
MD5 : e4bb71f1b2606d79f1687151ff0c629d
SHA1: 6FE8D65D010171924480C4CD996323DA23808F29

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