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What is the .STF File Extension?

.STF File Extension Description:

The basic tool for having the Setup configured in order to install Microsoft Project is the STF file extension, which specifies the installation process for each installation mode. It determines the sequence, nature, and the extent of user input as well as the options to install, where to install them, and how to respond to the current configurations.

Files with the .stf file extension consist of data in a tree-structured table wherein Setup takes different paths through the tree based on options that the user selects or on the environment where Setup had been executed. For instance, Setup takes one path through the tree if it finds a previous version of Microsoft Project installed and takes a different path if it does not.

Multiple paths in the tree may reference a portion of the table in order to eliminate the duplicate parts of the actual table all throughout the mentioned file with the .stf file extension. Multiple references to a single line allow Setup to process the STF file extension more quickly due to the fact that Setup actually carries out every line of the file with the file extension .stf only once. This is disregarding the number of paths that reference it.

The tree structure of the STF file extension affects the Setup process particularly if it does not know the file with the .stf file extension it will take, if it cannot accurately calculate the right amount of disk space, or if it cannot display the disk space requirements that are slightly higher than the actual space needed.

When using the Network Installation Wizard to modify the entries in the STF file extension, duplicate Yes/No questions or Start menu items can be seen. This is because the Wizard displays all the items in the tree even though some items may never be carried out by Setup during the installation process.

Setup determines if an installation were in maintenance mode by looking for an entry in the Windows registry in order to indicate that Setup has been run before. The entry is under the following key: HKEY_LOCAL_MACHINE/ Software/ Microsoft/ MSSetup/ Table Files.

The Name value in the Table Files subkey is the product version and name, and the Data value is the path to the STF file extension. If the Name value matches the product version and name that Setup is actually attempting to install, the Setup will run according to maintenance mode with the use of the file that has the file extension .stf identified within the Data value. If the Name value does not match the product version and name that Setup has attempted to install or if the Setup fails to find or have the unidentified STF file opened within the Data value, the Setup will run in install mode.

When Setup runs primarily in install mode, this necessitates the use of files with the STF file extension within the folder wherein the setup.exe file is located. Setup then recognizes the file with the .stf file extension by looking for the 8-character name portion of the Setup program file with the file extension STF.

Author: Microsoft Corporation
Author URL:
Related Applications: Microsoft Project
Common Path: N/A


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Do you have errors with .STF files?

The Typical Cause of .STF files Errors:

.STF files errors are potential severe Windows errors and many times are caused by a corrupted registry entry that you should fix right away to avoid even further corruption in other software and/or devices. Dangers include device failure, blue screen errors and fatal system crashes.

.STF files Errors - Common Symptoms:

.STF files error symptoms include software freezes, system shut down or start up troubles, jerky system performance, laggy behaviour, screen freeze, internal speaker beeps, problems loading documents and errors while installing software.

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How to Fix .STF File Extension Errors    |    What is the .STF File Extension?    |    Scan for .STF File Extension Errors