One wrong ISO can poison a PC before Windows even starts. This guide shows where every Windows and Linux image genuinely comes from, how to pick the right edition and language, and how to prove the downloaded file is untouched — with one simple hash check.
The video shows a single page where Windows 98 to Windows 11 and all the big Linux distros sit in one list, ready to download. That convenience is real — but here is the part nobody should skip: the page you find an ISO on is not the same thing as the maker of the ISO. Listing pages like the one in the video are third-party collections. They can be handy as an index, but they are not Microsoft and they are not Ubuntu. The safe habit this guide teaches: use any list to find your version, then take the file from the maker's own website — and verify it with a hash before it ever touches a PC.
👆 Read the address bar before the big button. The domain is the source — everything else on the page is decoration.
An ISO is a complete copy of an operating system's install disc. Whoever supplies that file can, in theory, change anything inside it — the installer, the defaults, even add software that was never in the original. That is why the source of an ISO matters more than its name.
A listing site collects links for many systems in one place; the page shown in the video does exactly that, and as a directory it is genuinely convenient. But trust does not transfer through a link. The file is only as good as the server it finally comes from. So the rule of this whole guide is simple:
Microsoft publishes the current Windows ISOs on its own software download pages, free for anyone to download — no account and no payment. The page offers three sections; the ISO lives in the one called Download Windows 11 Disk Image (ISO).
microsoft.com and go to the Software Download page for Windows 11 (the Windows 10 page works the same way)One honest detail: Microsoft's ISO download links are generated for you and expire after a while, so if a link stops working, just return to the page and generate a fresh one — never buy or borrow links from forums.
Linux has no single owner, so there is no single Linux download page — each distro is its own maker, and each publishes its images on its own website:
Choose Desktop for a normal computer and Server only for a machine that will serve others. On Ubuntu, the LTS release is the sensible default — years of support instead of months. Mirrors offered on the official page itself are fine; the project vouches for those. A mirror advertised on a random blog is not the same thing.
One honest pointer for afterwards: a multi-boot tool such as Ventoy can carry many ISOs on a single pen drive — fill that stick only with files that passed the hash check below, or the convenience just multiplies the risk.
A SHA256 hash is a fingerprint of the file. Change even one byte in a 6 GB image and the fingerprint changes completely, so a corrupted or poisoned ISO cannot sneak past this test.
certutil -hashfile Win11.iso SHA256 (use your exact file name)Where a maker does not print a hash next to the download, the check cannot help you — which is exactly why the source rule above matters so much. Hash and source protect each other.
The listing in the video also offers Windows XP, 7 and 8.1 — and here the honest truth matters: Microsoft no longer provides official ISO downloads for those versions, and all of them left security support years ago. Every copy circulating today passes through third-party hands, so no copy comes with the maker's guarantee.
That does not make old Windows useless. As a retro system inside an offline virtual machine, it is a fine hobby. Installed on a real PC that touches the internet, email or banking, it is an unpatched target. And if the real goal is making an old laptop useful again, a light, current Linux gives it a supported browser and fresh security updates on the same hardware — the honest recommendation.
Every Windows and Linux ISO found in one place — versions, editions and languages chosen live, step-by-step.
▶️ Watch Full VideoNo. It is a third-party listing page that collects download links for many operating systems in one grid. That can be convenient for finding a version, but it is not run by Microsoft or by any Linux project. For the file itself, use the maker's own website and verify the hash — that is the route this guide recommends.
Downloading the ISO from Microsoft is free and legal for anyone. What needs a licence is activating and using Windows. The same ISO installs Home or Pro — the edition follows the product key you enter, not the file you downloaded.
Delete the file and download it again from the official page. A mismatch means the file is not identical to the maker's release — most often a corrupted download, sometimes something worse. Do not try to fix or install it. If a second download from the official source still fails, check the file on another computer before using it anywhere.