Run the MediaCreationTool.exe (Admin rights not required but helpful).
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.
Accept the license terms.
Select Create installation media (USB flash drive, DVD, or ISO file) . Windows 10 Pro Iso File Download 64 Bit Highly Compressed
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.
https://www.microsoft.com/software-download/windows10 Under “Create Windows 10 installation media”, click Download tool now .
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 . Run the MediaCreationTool
Select where to save the ISO. File size: ~5.0–5.5 GB .
Wait for download and creation (10–30 minutes depending on speed).
The page will now offer a direct ISO download instead of the tool. They are 99% malware
Select Windows 10 Pro 64-bit, confirm language, download.
A clean, official, uncompressed ISO. Method 2: Direct ISO Download Using Browser Trick (No Tool) Microsoft hides direct ISO links unless your user-agent is non-Windows. Here’s how: