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File Version : 4.00
Description : Compaq NetFlex network driver
Copyright : Compaq Computer Corp. 1993-1994
Product Version : 4.00
Product Name : Compaq Support Software for Microsoft Windows NT(TM)
Company Name : Compaq Computer Corp.
Internal Name : NETFLX.SYS
File Size: 28944 byte(s) 28.272 KB
MD5 : 8bb10b441253e2e4002605092bbbdddc
SHA1: C8820CDC9DD8058724FB24F2A8B7D54555217C7B

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