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How to Download a Genuine Windows ISO Safely (Windows 10 and 11)

Installing Windows on a computer

Short answer: always download your Windows ISO directly from Microsoft's official site, never from a third-party "direct download" mirror. Microsoft offers Windows 10 and 11 ISOs and a Media Creation Tool for free, and using them avoids the tampered, malware-laced ISOs that unofficial sites are notorious for. Here is the safe, correct way.

Why unofficial ISO sites are dangerous

Old posts linked to random "Windows ISO direct download" pages. The problem: you have no way to verify those files are genuine. Tampered Windows ISOs can ship with backdoors, spyware or bundled junk baked into the installer, and you would be handing your entire PC to whoever modified it. There is zero reason to risk it when Microsoft gives the real thing away.

Download Windows 11 (official)

  1. Go to Microsoft's official Windows 11 download page.
  2. Under "Download Windows 11 Disk Image (ISO)", select the edition and language.
  3. Download the ISO directly from Microsoft's servers.

Download Windows 10 (official)

Microsoft's Windows 10 download page offers the Media Creation Tool, which can either upgrade your PC directly or create an ISO / bootable USB.

Create a bootable USB

  • Easiest: the Media Creation Tool builds a bootable USB for you.
  • From an ISO: use the free Rufus to write the ISO to an 8 GB or larger USB stick.

A decent USB 3.0 flash drive makes the install noticeably faster.

Verify you downloaded the real thing

Because it came straight from microsoft.com, it is genuine. If you ever have an ISO from elsewhere, you can check its SHA-256 hash against Microsoft's published value, but the simplest safety rule is to only download from Microsoft in the first place.

The non-obvious tip: check requirements before Windows 11

Windows 11 requires TPM 2.0 and Secure Boot. Before you install, run Microsoft's PC Health Check, or look in your BIOS, so you do not get halfway through an install only to hit a compatibility wall. On unsupported hardware, Windows 10 (supported into its extended timeline) may be the better choice.

Frequently asked questions

Where do I download a genuine Windows ISO?

Only from Microsoft's official software-download pages for Windows 10 and 11. Never use third-party mirror or 'direct download' sites.

Are unofficial Windows ISO sites safe?

No. Tampered ISOs can contain malware or backdoors baked into the installer. Microsoft provides genuine ISOs for free, so there is no reason to risk it.

How do I make a bootable Windows USB?

Use Microsoft's Media Creation Tool, or write an official ISO to an 8 GB+ USB stick with the free tool Rufus.

Can my PC run Windows 11?

It needs TPM 2.0 and Secure Boot. Run Microsoft's PC Health Check first. On unsupported hardware, supported Windows 10 may be a better choice.

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