File Extension U

.U File

File extension: U
File type: Ipflow File
Do you have speed issues?
First check your registry for invalid entries.


Notes about the U file extension:



Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.

The U file type is primarily associated with 'Nitpicker'. Nitpicker will write flows into a file when there are N flows in the savequeue. They are moved there after N seconds since the flowstart. The flowfile is called FLOW..U. At the end of a dumping period, the .U files will be renamed to *.S, and new .U file will be created.

Detailed information for file extension U:


Primary association: Nitpicker
Related links: SourceForge Project Page

Other applications associated with file type U:

  • Subsampled Raw YUV (Bitmap) This association is classified as Graphic.
  • Unknown Apple II File ((found on Golden Orchard Apple II CD Rom))
  • Unreal (System File)UCC compiled UnrealScript. The identifying characters used for this association are - Hex: C1 83 2A 9E
  • Unreal Tournament 2003 (System File) by Epic Games, Inc.
File Identifier - TrID
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database




Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.

Technical data

To view technical data on file-extension U click this link to expand/hide the additional area.

System Info for File Extension .U

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: WinZip
EXEFile: %ProgramFiles%\WINZIP\winzip32.exe %1

ProgramID: Winamp.File
EXEFile: %ProgramFiles%\Winamp\Winamp.exe %1

ProgramID: WinRAR
EXEFile: %ProgramFiles%\WinRAR\WinRAR.exe %1

ProgramID: RealPlayer.AU.6
EXEFile: %ProgramFiles%\Real\RealOne Player\RealPlay.exe %1

ProgramID: RealPlayer.AU.6
EXEFile: %ProgramFiles%\Real\RealPlayer\RealPlay.exe %1

ProgramID: PAENC
EXEFile: %ProgramFiles%\PowerArchiver\POWERARC.EXE %1

ProgramID: AUFile
EXEFile: %ProgramFiles%\Adobe\Audition 1.5\Audition.exe %1

ProgramID: AUFile
EXEFile: %ProgramFiles%\Windows Media Player\wmplayer.exe /Open %L

Program Name and MIME Type Info for File Extension .U

FILExt has been given permission to display a Program Name/MIME type database collected by Anthony R. Nemmer. Some of this data has already been included into the main FILExt database. Those entries which have not yet been incorporated are displayed below.
Program Name Mime Type audio/basic

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Did you know

Everytime you install and uninstall software you are modifying key system components including your PC registry. This can result in a fragmented registry and invalid entries accumulating over time.

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