The Error Lookup Tool, also known as "ERR", is a command-line tool to decode many Microsoft error codes. It does not require elevation and is very easy to use.
Publisher’s description
What is Error Lookup Tool?
Error Lookup Tool is a proprietary program for Windows from Microsoft Corporation.
Installation and requirements
Official installers exist for 32-bit as Portable. The main installer is 2.3 MB. It runs without installation (portable).
Pros / Cons
Pros
- Portable: runs without installation
- Small download (2.3 MB)
Cons
- Proprietary licence: check the terms and price
- No native ARM64 build
- 32-bit only
- No update for more than a year
In short: Error Lookup Tool is a Windows tool for 32-bit PCs. Updates have slowed down.
Is Error Lookup Tool safe to download?
- The file is served by download.microsoft.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
88739EC82BA16A0B4A3C83C1DD2FCA6336AD8E2A1E5F1238C085B1E86AB8834A· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 6.4.5Latest | November 2, 2023 | 2.3 MB | 32-bit Portable |
Install from the command line
Silent install ›winget install --id Microsoft.err -eProgram files (.exe): err.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Microsoft Corporation
- Licence
- Proprietary
- Price
- See the publisher’s site
- Requires
- Windows 11 / 10
- Architecture
- 32-bit
- Installer
- Portable
- Version
- 6.4.5
- Released
- November 2, 2023
- Added to the catalogue
- November 2, 2023
- Versions listed
- 1
- winget ID
- Microsoft.err
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is Error Lookup Tool free?
Error Lookup Tool is proprietary (closed-source) software (licence: Proprietary). Whether it costs money depends on the edition: check the publisher’s site for prices and free tiers.
Is Error Lookup Tool safe to download?
The download comes from download.microsoft.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Error Lookup Tool with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does Error Lookup Tool run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.
Can I use Error Lookup Tool without administrator rights?
Yes, it is portable: unpack and run it.
