I don't know where exactly you downloaded this installer, but know that there are quite some old downloads of older GCC+MinGW-w64 versions.

You can get a recent standalone version for Windows without installer from https://winlibs.com/.

Or more advanced command line users may choose to install MSYS2 shell and install MinGW-w64 via its package manager (pacman).

Answer from Brecht Sanders on Stack Overflow
Discussions

MinGW-w64 - for 32 and 64 bit Windows / Discussion / Help: cannot download repository.txt
When I try to install Mingw-w64, the error "cannot download repository.txt" appears. What should I do? More on sourceforge.net
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December 16, 2020
MinGW-w64 - for 32 and 64 bit Windows / Discussion / Help: Error while installing: Cannot download Repository.txt file
I was trying to install MinGW-W64 with the latest available .exe file, which is on SourceForge. But I'm getting the error - "Cannot download Repository.txt file". I know this error has been there since quite some time. More on sourceforge.net
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May 8, 2017
MinGW-w64 manual installation for MATLAB R2017b: Which installer options for threads and exception handling are preferred?
Our firewall prevents use of the MATLAB Add-on installer and the 'mingw-w64-install.exe' standalone installer [the latter cannot download its "repository.txt" manifest file]. Following instructi... More on mathworks.com
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January 15, 2018
How do I fix ming-gw cannot download repository.txt error?
I had to do this myself just now, so here are the full instructions for anyone who needs them: Install msys2-x86_64-20240727.exe from https://www.msys2.org/ Add the GCC directory to your environment variables Type environment into your start menu and select Edit environment variables for your account Scroll down to Path in the user section and click Edit... Click New and paste in C:\msys64\ucrt64\bin (or wherever you installed MSYS2 to) (Optional) Also add C:\msys64\usr\bin, which will let you run commands like ls or rm from anywhere, not just GCC Open MSYS2/MSYS2 UCRT64 from your start menu Type pacman -S --needed base-devel mingw-w64-ucrt-x86_64-toolchain Run VSCode and install the C/C++ extension from Microsoft Open a .c file Click the dropdown next to the ▷ icon in the tab bar near the top of the window, set it to Debug C/C++ and run your file If you have a project with more than one .c file or libraries you need to link, you'll either have to create a custom launch command that explicitly tells GCC what files you want it to use, or use a CMake project and open that. More on reddit.com
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July 29, 2024
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Reddit
reddit.com › r/c_programming › how do i fix ming-gw cannot download repository.txt error?
How do I fix ming-gw cannot download repository.txt error? : r/C_Programming
July 29, 2024 - Type pacman -S --needed base-devel mingw-w64-ucrt-x86_64-toolchain · Run VSCode and install the C/C++ extension from Microsoft · Open a .c file · Click the dropdown next to the ▷ icon in the tab bar near the top of the window, set it to Debug C/C++ and run your file ·
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Narkive
mingw-w64-public.narkive.com › ubLwCYzA › unable-to-install
[Mingw-w64-public] unable to install
Hi, Fixed. https://sourceforge.net/p/mingw-w64/bugs/528/ https://sourceforge.net/projects/mingw-w64/files/Toolchains targetting Win32/Personal Builds/mingw-builds/installer/mingw-w64-install.exe Hello, Well, I tried the installer just now, and it had the same problem. Carl. ... Post by Carl Sturtivant Hello, Well, I tried the installer just now, and it had the same problem. Hmm.. Just now I have downloaded the installer and it works as expected.
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SourceForge
sourceforge.net › home › browse › mingw-w64 - for 32 and 64 bit windows › bugs
MinGW-w64 - for 32 and 64 bit Windows / Bugs / #806 Cannot download repository.txt
July 12, 2019 - Download installer mingw-w64-install.exe Download repository.txt into the same folder as mingw-w64-install.exe Run mingw-w64-install.exe In the Settings window, change the Architecture to x86_64 and click Next Follow instructions and verify that C:\Program Files\mingw-w64 has been made To open ...
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SourceForge
sourceforge.net › home › browse › mingw-w64 - for 32 and 64 bit windows › bugs
MinGW-w64 - for 32 and 64 bit Windows / Bugs / #410 Installer cannot download repository.txt
July 3, 2014 - I was apparently using an old link to a no longer updated repository of some years ago ... If you would like to refer to this comment somewhere else in this project, copy and paste the following link: ... Hi, I've downloaded the latest version but I'm still getting the same error https://sourceforge.net/projects/mingw-w64/files/Toolchains targetting Win32/Personal Builds/mingw-builds/installer/mingw-w64-install.exe/download
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Narkive
mingw-w64-public.narkive.com › Up9rNRQL › mingw-installer-problem
[Mingw-w64-public] Mingw installer problem
Post by Aleksnader Lesniak Hi, When trying to install Mingw from the online installer, I get the following "Cannot download repository.txt[0]" This is from the latest Sourceforge binary download. Is there an offline installation package? Hi, This is a known issue: https://sourceforge.net/p/mingw-w64/bugs/413/ Please wait until this bug will be fixed, or please download the builds directly.
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YouTube
youtube.com › watch
Mingw-w64 "Cannot download repository.txt" Error Fix - YouTube
Mingw-w64 "Cannot download repository.txt" Error Fixchocolatey:https://chocolatey.org/install Updated Video Here : https://youtu.be/5xoT50STCeE
Published   June 17, 2024
Find elsewhere
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Google Groups
groups.google.com › d › topic › linrad › s3yIaUQTUgI
HELP!!!
March 5, 2016 - This link: https://sourceforge.net/projects/mingw-w64/ gives an installer, mingw-w64-install.exe for US users, but here in Sweden it gives mingw-w64-v4.0.5.tar.bz2 The installer I find somewhere (have forgotten the URL) gives this error: Cannot download repository.txt [0] Using cygwin or msys2 is too scary for the kind of people I want to be able to make small modifications to a simple file they can share among them in groups using the same hardware.
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YouTube
youtube.com › melvin cabatuan
[SOLVED] MinGW Cannot Download Repository.txt - YouTube
For me, its just internet problems... With a good internet connection, this error usually goes away.
Published   January 30, 2017
Views   5K
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YouTube
youtube.com › watch
[NEW] Mingw-w64 "Cannot download repository.txt" Error Fix - YouTube
https://youtube.com/shorts/XAD3RteBmek?feature=shareNEW - Mingw-w64 "Cannot download repository.txt" Error FixMingw-w64 "Cannot download repository.txt" Erro...
Published   August 18, 2024
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SourceForge
sourceforge.net › home › browse › mingw-w64 - for 32 and 64 bit windows › bugs
MinGW-w64 - for 32 and 64 bit Windows / Bugs / #528 install fails - cannot download repository,txt
February 15, 2016 - The URL requested is http://.../repository.txt, however it is redirected by sourceforge to https://.... But the installer doesn't follow the redirection, hence it fails. I attempted to fix the error by myself, but couldn't find the source of the installer anywhere. ... If you would like to refer to this comment somewhere else in this project, copy and paste the following link: ... Fixed. https://sourceforge.net/projects/mingw-w64/files/Toolchains targetting Win32/Personal Builds/mingw-builds/installer/mingw-w64-install.exe
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SourceForge
sourceforge.net › home › open source software › software development › compilers › mingw-w64 - for 32 and 64 bit windows
Download repository.txt (MinGW-w64 - for 32 and 64 bit Windows)
MinGW-w64 - for 32 and 64 bit Windows The mingw-w64 project is a complete runtime environment for gcc to support binaries native to Windows 64-bit and 32-bit operating systems. 111 Reviews Downloads: 46,777 This Week Last Update: 12 hours ago ... Get notified by email when MinGW-w64 - for 32 ...
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YouTube
youtube.com › watch
Fix error The file has been downloaded incorrectly in Mingw-W64 | How to install Mingw-W64 correctly - YouTube
Ho to fix the error "The file has been downloaded incorrectly" in Mingw-W64. How to install mingw-w64 correclty on windows. How to install mingw-w64 using th...
Published   April 3, 2022
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SourceForge
sourceforge.net › home › browse › mingw-w64 - for 32 and 64 bit windows › mailing lists
[Mingw-w64-public] Mingw installer problem | MinGW-w64 - for 32 and 64 bit Windows
October 29, 2014 - mingw-w64 · Wiki2 · Menu ▾ ▴ · mingw-w64-documentation · mingw-w64-ironcrate · mingw-w64-public · mingw-w64-svn · View entire thread · × · Thanks for helping keep SourceForge clean.
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SourceForge
sourceforge.net › home › browse › mingw-w64 - for 32 and 64 bit windows › discussion
MinGW-w64 - for 32 and 64 bit Windows / Discussion / Help: Error while installing: Cannot download Repository.txt file
May 8, 2017 - I was trying to install MinGW-W64 with the latest available .exe file, which is on SourceForge. But I'm getting the error - "Cannot download Repository.txt file". I know this error has been there since quite some time.
🌐
SourceForge
sourceforge.net › home › browse › mingw-w64 - for 32 and 64 bit windows › bugs
MinGW-w64 - for 32 and 64 bit Windows / Bugs / #697 Cannot download repository.txt
mingw-w64 · Wiki2 · Menu ▾ ▴ · Create Ticket · View Stats · v1.0 (example) Changes · Closed Tickets · Open Tickets · Formatting Help · Milestone: v1.0 (example) Status: open · Owner: nobody · Labels: None · Priority: 5 · Updated: 2018-02-18 · Created: 2018-01-15 · Creator: Taras Mackuh · Private: No · Got error "Cannot download repository.txt...
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MathWorks
mathworks.com › matlabcentral › answers › 377165-mingw-w64-manual-installation-for-matlab-r2017b-which-installer-options-for-threads-and-exception-h
MinGW-w64 manual installation for MATLAB R2017b: Which installer options for threads and exception handling are preferred? - MATLAB Answers - MATLAB Central
January 15, 2018 - Our firewall prevents use of the MATLAB Add-on installer and the 'mingw-w64-install.exe' standalone installer [the latter cannot download its "repository.txt" manifest file]. Following instructi...
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SourceForge
sourceforge.net › home › browse › mingw-w64 - for 32 and 64 bit windows › support requests
MinGW-w64 - for 32 and 64 bit Windows / Support Requests / #178 Installer error: "The file has been downloaded incorrectly!"
If you don't see the folder or file, my guess is that your firewall/anti-virus is blocking the file from being downloaded. You could probably try turning it off to see. Or you just go to · https://sourceforge.net/projects/mingw-w64/files/Toolchains targetting Win64/Personal Builds/mingw-builds/