Although, Windows 10 has been announced by Microsoft, it will not be available for the users anytime soon. Currently the latest version of Windows OS is Window 8.1, which was an upgrade to Windows 8. Now if you own a Windows 8 running device then you can upgrade to Window 8.1 for free. However, if you are on Window 7 or earlier version of OS then Microsoft provides a 30-day trial copy of Windows 8.1 and after the trial period, you could continue using it by purchasing product key.
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You can install Windows 8.1 on your PC through either a bootable flash drive or using Windows 8.1 ISO file. Unfortunately, Microsoft has stopped providing Windows 8.1 ISO file through its official website to tackle piracy related issues. However, Microsoft does provide a way to download Window 8.1 ISO through a tool called Installation media creation tool. Once you install installation media creation tool, launch it, select Windows 8.1 ISO file and download it on your PC. Follow these steps to know how to download Windows 8.1 ISO.
How to Download Windows 8.1 ISO
Step 1: Download installation medial creation tool by visiting Microsoft official website and then click Create media button to download this tool.
Step 2: Once downloaded, run it on your PC.
Step 3: Under Windows Installation Media Creation Tool windows select Language as English.
Step 4: Select Edition as Windows 8.1 and Architecture as 64 or 32 bit and click on Next.
Step 5: Next, you will be asked whether you want to create bootable flash drive or want to download ISO. Select ISO and click Next.
Step 6: Now select a directory where you want to save your ISO file and click Save.
Step 7: Now your Windows 8.1 ISO will start downloading with an estimated time based on your internet speed. Wait until the download completes and there you have Windows 8.1 ISO saved in your PC.
You can use this ISO file to create bootable flash drive of Window 8.1 as well. However, as I mentioned earlier it comes with a trial period of 30 days and you need a activation code to continue using it after 30 days.