Hi blitzduck, To downgrade from Windows 8 to windows 7 operating system, we need to do a clean installation of operating system on the computer. If you have windows 7 Operating system disk with you, install using the same disk. This would void software warranty on the computer (software related queries/ issues). Refer below link to install windows 7 on the computer. [URL] Note: Kindly back up data before reinstalling Operating system. Please reply if you have any further questions.
So, yesterday I got a Dell Inspiron 3521 pre-loaded with Windows 8. I'm in my second semester in college and it was time I got a laptop to help with my studies. I highly dislike Windows 8 - I wanted to get my laptop ordered with Windows 7 on it but Dell wouldn't let me do so (thanks a lot!). I figured it wouldn't be a big deal and that I could just downgrade myself once I got the laptop. Wrong! Apparently the only way I can downgrade to Windows 7 is if I have Windows 8 Pro (and I don't), and even then I would have to buy a DVD for the installation. After searching on Google, the only way I've found it possible to downgrade is if I had Windows 7 to begin with. That's retarded. Where are my downgrade rights? Surely this is a mistake? Is it possible to downgrade my Inspiron to Windows 7 if it came with Windows 8? Thank-you. 
Not liking this OS...