Hi, and thank you for asking your question.
If you want to upgrade your system to Windows 7, you will need to back up your data first and then carry out a FRESH installation using a Windows 7 installation disk. You may order the disk online from Amazon, using the following link:
Having gotten the installation disk, follow the given steps to install Windows 7:
Restart your computer.
Press any key when prompted, and then follow the instructions that appear. (If you not prompted to press any key to boot from DVD, just restart and tap down the F12 key to boot from your CD/DVD drive accordingly.)
On the Install Windows page, enter your language and other preferences, and then click Next.
On the Please read the license terms page, if you accept the license terms, click I accept the license terms, and then click Next.
On the Which type of installation do you want? page, click Custom.
On the Where do you want to install Windows? page, click Drive options (advanced).
Click the partition that you want to install Windows 7 in (C:), click the formatting option you want to perform (Quick Format), and then follow the instructions.
When you've finished formatting, click Next.
After you have installed Windows 7, you will also be able to upgrade to Windows 10 (the latest version) for FREE, if your system supports it - you will be automatically prompted by Windows to upgrade, after you have installed Windows 7.
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