Select Create installation media (USB flash drive, DVD, or ISO file) .
https://www.microsoft.com/software-download/windows10 Under “Create Windows 10 installation media”, click Download tool now .
Select where to save the ISO. File size: ~5.0–5.5 GB . Windows 10 Pro Iso File Download 64 Bit Highly Compressed
Select Windows 10 Pro 64-bit, confirm language, download.
certutil -hashfile "C:\path\to\Windows.iso" SHA1 Compare with official values from Microsoft documentation. Do not download any pre-compressed “Windows 10 Pro 64-bit highly compressed” ISO from any website, torrent, or YouTube video. They are 99% malware. Compress the official ISO yourself using 7-Zip. If you see a 1 GB or 2 GB file claiming to be a full Windows 10 Pro 64-bit ISO — run a virus scan immediately and delete it. Select Create installation media (USB flash drive, DVD,
Official ISO, still ~5 GB. Method 3: Using the Windows ESD File (Smaller, But Advanced) Microsoft uses .ESD (Electronic Software Download) files that are 30–40% smaller than ISOs.
Accept the license terms.
Run the MediaCreationTool.exe (Admin rights not required but helpful).
1.1 The Truth About "Highly Compressed" Windows ISOs When you search for "Windows 10 Pro ISO 64-bit highly compressed" , you are looking for a file that is smaller than normal. A standard Windows 10 64-bit ISO is 4.5 GB to 5.5 GB . A “highly compressed” version might claim to be 1 GB to 2 GB . File size: ~5
Wait for download and creation (10–30 minutes depending on speed).