Known FEF Files

Primary FEF File Association

.FEF

Extension:	.fef
Category:	Steuer 2001 File

The file extension FEF is associated with an old German accounting program known as Steuer2001. The FEF files were part of the files found in Steuer2001.

Company:	Unknown Developer
File Category:	Uncommon Files
Entry:	HKEY_CLASSES_ROOT\.fef

Software Programs That Open The Steuer 2001 File:

Steuer2001 by Unknown Developer

Windows

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FEF File Complications

Troubles Opening FEF Files

Steuer2001 is Not Installed

You encounter an error message such as "%%os%% Can't Open FEF Files" when trying to open your FEF. Generally, this is experienced in %%os%% because Steuer2001 isn't installed on your PC. The typical path of opening your FEF with a double-click won't work because %%os%% cannot make the program connection.

Tip: If you don't have Steuer2001 installed, and you know of another program to open your FEF file, you can try opening it by selecting from the programs listed under "Show Apps".

Incorrect Steuer2001 Version

It is possible that your version of Steuer2001 isn't able to open your Steuer 2001 File file due to incompatibility. Download the latest Steuer2001 version from the Unknown Developer website to ensure you have the correct one installed. This problem is most common when you have an older version of the software application, and your file was created by a newer version that it cannot recognize.

Tip: You can sometimes get hints about the right program version by right-clicking on the FEF file, selecting "Properties", and looking at the version information.

Summary: Not having the right Steuer2001 version on your computer can cause problems opening FEF files.

Other FEF File Opening Causes

In the majority of cases, installing the right version of Steuer2001 will resolve your issue. There can be external issues inside of %%os%% that are causing these errors when opening FEFs. Problems unrelated to software:

• Invalid FEF file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Accidental deletion of the description of the FEF file in the Windows registry
• Corrupt install of Steuer2001 or other FEF-related program
• The FEF itself is corrupted
• Your FEF is infected with malware
• Drivers associated with FEF software need to be updated
• Windows has inadequate resources to open your Steuer 2001 File file