Windows 7 - Use your product key to download the ISO file from Microsoft. Then download the Windows DVD/USB Download Tool to create an installation DVD or USB drive using the ISO file that you just downloaded. Windows 8 - Visit the Microsoft Windows 8. 1 download page and click the “Create media” button. Run the tool and follow the prompts to download and create an installation DVD or USB drive. [2] X Research source Windows 10 - Visit the Windows 10 download page and click the “Download tool now” button. Follow the prompts in the tool to download the Windows 10 files and create an installation DVD or USB drive.

See How to Back Up Data for instructions on backing up your important files.

Windows 7 or earlier (BIOS) - Reboot your computer and then press the BIOS, Setup, or Boot key. This key will be displayed on the screen while your computer is booting before Windows loads. Typical keys include F2, F10, F11, or Del. Open the BOOT menu and set your DVD or USB drive to be the primary boot device. Windows 8 or later (UEFI) - Open the Start menu and right-click on the Power button. Hold down ⇧ Shift and click “Restart. " Select “Troubleshoot” from the menu that appears, and then “Advanced options. " Click the “UEFI Firmware Settings” button to open your UEFI menu. The Boot section of this menu will allow you to change the boot order so that your computer boots from the USB or DVD drive.

You can repeat this for any other partitions that you want to remove and combine into your main one. Any data on these partitions will be deleted as well. Click “Extend” to combine block of unallocated space into a single partition. You can split your partition into multiple partitions if you want. This may be useful for file organization. Select the unallocated space and click “New” to create new partitions from the unallocated space. Just make sure the partition you intend to install Windows on is at least 20 GB in size.

You can also click the Wi-Fi icon in the upper-right corner and select the network you want to use.