What's the RLU File?

Written by:   |   Last Updated: March 09, 2025

Microsoft Partner

RLU File Summary

File Extension RLU has only one distinct file type (Unknown File Type format) and is mostly associated with a single related software program from Unknown Developer (Unknown Software). Generally, these files are considered Uncommon Files.

We have found RLU files on the Windows operating system platform. They are both mobile and desktop device friendly. These files have a Popularity Rating of "Low", meaning they are not very commonly observed on your average hard disk.

Although there is a lot more to know about RLU files, those are the most important details of these types of files. If you are having trouble opening these files, or would like more detailed information, please see our comprehensive information below.

Low
Prevalence
8211
Position

/ 11690

Active

Importance

9

March

2025

Revised

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Kinds of RLU Files


Main RLU Affiliation

.RLU
File Name:.rlu
Category:Unknown File Type

Organization: Unknown Developer
Division:Uncommon Files
Subkey: HKEY_CLASSES_ROOT\.rlu

Software Programs That Open The Unknown File Type:


Unknown Software by Unknown Developer

Windows

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RLU Demand


OS Hierarchy

7 (45.73%)
10 (44.56%)
8.1 (5.41%)
XP (2.79%)
8 (0.97%)


RLU File Complications


Common RLU Opening Problems

Unknown Software Removed

If you attempt to load your RLU file, you experience a message such as "Can't Open RLU Files". If so, it typically means that you don't have Unknown Software installed for %%os%%. Your operating system cannot associate your RLU with Unknown Software, so double-clicking the file won't work.


Tip: When you have another program installed that you know will open your RLU, you can select it from the other programs listed (see "Show Apps").


Unknown Software is Out-of-Date

Your Unknown File Type file is incompatible with Unknown Software because you might have the wrong version installed. Installing the latest version of Unknown Software from Unknown Developer is recommended. This issue mainly occurs when your Unknown File Type file was created by a newer version of Unknown Software than you have on your PC.


Tip: Investigate your RLU file by right-clicking and selecting "Properties" to find clues on what version you need.


Summary: In either case, the majority of problems opening RLU files are related to not having the correct software application installed on your computer.


Associated Difficulties Loading RLU Files

Although you might already have Unknown Software or another RLU-associated software installed on your computer, you can still encounter problems opening Unknown File Type files. If you're still experiencing problems opening RLU files, there could be other computer problems. Problems unrelated to software:

  • Invalid RLU file references in the Windows Registry (the "phonebook" of the Windows Operating System)
  • Mistaken removal of the Windows registry RLU description
  • Incomplete or bad installation of a software application associated with the RLU format
  • File corruption affecting your RLU file
  • Malware-tainted RLU file can't be opened
  • Drivers associated with RLU software need to be updated
  • Windows has inadequate resources to open your Unknown File Type file

Quiz: Which file extension is a type of raster image?








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