CFOSSPEED file format description

Many people share .cfosspeed files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cfosspeed file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cfosspeed files.

1 filename extension(s) found in our database.

.cfosspeed - cFosSpeed Registration Key Data

The CFOSSPEED data files are related to cFosSpeed. The CFOSSPEED file is a cFosSpeed Registration Key Data. cFosSpeed is a network driver, which attaches itself to existing Internet connections.

Data files
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cFosSpeed Registration Key Data related extensions:
Snapform XML Form Data
SHELX Chemical Model RES Data
DATAIR FAS 87/132 Reporter Custom Data
Briggs Softworks Calendar Commander Data
PTC Creo Assembly Member Information Data
ISOBuster Custom CD Menu Data

Naturally, other applications may also use the .cfosspeed file extension. Even harmful programs can create .cfosspeed files. Be especially cautious with .cfosspeed files coming from an unknown source!

Can't open a .cfosspeed file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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