Download Windows 10 ISO direct from Microsoft

If you're desperate getting windows 10 ISO direct from Microsoft link instead of getting from torrent website, make no mistake, you can get it here, but before we're move on to download this Windows 10 ISO probably you can check minimal operating system requirement :

To upgrade to Windows 10:

Run the media creation tool.
If you're upgrading the device you downloaded the tool on, select Upgrade this PC now.
-or-
If you want to create media to upgrade a different device, select Create installation media for another PC.

Choose the language, edition, and architecture (64-bit or 32-bit) for Windows 10. This table will help you decide which edition of Windows 10 you’ll need

Windows version being upgraded	Windows 10 edition Note: If you have an N edition of Windows on your PC, choose the N equivalent of Windows 10 for creating installation media.
Windows 7 Starter Windows 7 Home Basic Windows 7 Home Premium Windows 8/8.1 Windows 8.1 with Bing Windows 10 Home	Windows 10 Home
Windows 7 Professional Windows 7 Ultimate Windows 8 Pro Windows 8.1 Pro Windows 8/8.1 Professional with Media Center Windows 10 Pro	Windows 10 Pro
Windows 8/8.1 Single Language Windows 8 Single Language with Bing	Windows 10 Home Single Language
Windows 8/8.1 Chinese Language Edition Windows 8 Chinese Language Edition with Bing	Windows 10 Home China

Check these things on the PC where you want to install Windows 10:

64-bit or 32-bit processor (CPU). You’ll create either the 64-bit or 32-bit version of Windows 10 that’s appropriate for your CPU. To check this on your PC, go to PC info in PC settings or System in Control Panel, and look for System type.
System requirements. See the system requirements before installing Windows 10. We also recommend that you visit your PC manufacturer's website for info about updated drivers and hardware compatibility.
Language in Windows. You'll need to choose the same language when you install Windows 10. To see what language you're currently using, go to Time and language in PC settings or Region in Control Panel.
Edition of Windows. You should also choose the same edition of Windows. To check what edition you're currently running, go to PC info in PC settings or System in Control Panel, and look for Windows edition. Windows 10 Enterprise isn’t available here. Please see the Volume Licensing Service Center for more information.
Microsoft Office products. If you just purchased a new device that includes Office 365, we recommend redeeming (installing) Office before upgrading to Windows 10. To redeem your copy of Office, please see Download and install Office 365 Home, Personal, or University on your PC. For more information, check How to upgrade to Windows 10 on new devices that include Office 365.
If you have Office 2010 or earlier and choose to perform a clean install of Windows 10, you will need to locate your Office product key. For tips on locating your product key, check Find your Office 2010 product key or Enter the product key for your Office 2007 program.

Minimum system requirement for windows 10