You can even perform the upgrade without reserving it, through the ISO image made using the media creation tool provided by Microsoft.
The media creation tool can be used to upgrade your current PC to Windows 10 or to create a USB or DVD and install Windows 10 on a different PC.
Note: You must have valid licensed OS of Windows 7 SP1 or Windows 8.1 in order to entitle to free upgrade to Windows 10.
Get Windows 10 app on your PC first which is designed to make the upgrade process easy. It checks to make sure your device is compatible, has information to help you learn about the features in Windows 10, and allows you to begin your free upgrade to Windows 10.
For devices running Windows 7 or Windows 8/8.1 Update with Windows Update enabled, the app shows up automatically as a Windows icon in your system tray at the bottom right-hand side of your screen.
If you have reserved, Microsoft will notify you when your upgrade is ready. You have until July 29, 2016 to take advantage of this free upgrade offer. Once you upgrade, you’ll have Windows 10 for free on that device.
Though recommended, it’s not necessary to install all available updates from Windows Update before upgrading. You can perform Windows 10 installation on Windows 7 SP1 or Windows 8.1 PC through USB drive or DVD created through media creation tool.
You must upgrade to Windows 10 from currently activated Windows 7 or Windows 8.1 to record your device hardware ID with Microsoft before performing clean install Windows 10 and stay activated under free upgrade license to start afresh. Using free upgrade offer to perform a clean install on first attempt will result in deactivation.
When installing Windows 10 from clean state on the same device which has upgraded to and activated in Windows 10, no product key is necessary (skip the entering of product key during setup). Windows will automatically activated itself.
If you attempt to use the generic product key to install Windows 10 on NEW device, it won’t activate. In Windows 10, Windows Product Activation is no longer controlled by SPP (Software Protection Platform). Instead, it’s handled by Client License Service (ClipSVC), with tokens.dat file stored in C:\ProgramData\Microsoft\Windows\ClipSVC\. But like SPP, the hardware ID in the device license can be changed (such as changing hard disk). As long as it’s still with in tolerance with the device hardware ID, the device continues to be permanently activated.
Windows 10 Installation Guide
Installing and upgrading to Windows 10 through an ISO image created through media creation tool. You can install either from DVD or from a USB flash drive or through Windows 10 App from Windows Update.
In Windows 8.1, mount the ISO image.
For Windows 7, use a third party tool to mount the ISO, or install through DVD disc or USB flash drive, or extract the content of the ISO to a folder with file archiver such as WinRAR, WinZip, 7-Zip and etc.
Execute the setup.exe program in the ISO image.
Select Download and install updates (recommended) or not right now on whether to get the latest updates of Windows 10, then hit Next button.
Note: This step may take a while if you choose to download and install updates. [You can choose "Not right now" option and install the updates later]
Choose what you want to keep:
- Keep personal files, apps and Windows settings – Recommended.
- Keep personal files only – Settings and apps will be deleted.
- Nothing – Everything will be deleted, including files, apps and settings.
To ensure that your system’s hardware ID is properly registered for free Windows 10 upgrade license through device license with Microsoft, choose to keep everything. Hit Next button to continue.
Confirm the start of upgrading process to Windows 10 by hitting Install button.
Wait for the “Installing Windows 10″ process to complete. The PC may restart several times during the update.
Once installation and upgrading to Windows 10 is completed, you will be greeted with a “Hi there, welcome back!” screen.
Wait for a while, and you should be back up at Windows 10.
You can downgrade from Windows 10 and rollback to original Windows 7 or Windows 8.1 if you wish.
Note: You have one month to go back to Windows 7 or Windows 8.1 after installing Windows 10. So make sure you make up your mind before the option disappears.
The first step is of course to back up any information you currently have on your PC that you want to keep. Changing an operating system is a big thing, and data can often be lost along the way. When you’ve safely copied any documents, video, photos, or other important data you need, you’re ready to begin.
If you've added any user accounts since upgrading you'll have to sign out of them and then remove them from the main account before you can downgrade.
Price: Microsoft Windows 10: Home edition priced at Rs 7,999 and Windows 10 Pro at Rs 14,999 in India.
Consumers can head to the Microsoft Store to purchase it online or can simply head to retail stores in the country. In India, more than 1500 retail stores across the country will help consumers move up to Windows 10.