Did you ever buy a boxed retail copy of Windows 7? If you did, you may still be able to install it on your new PC today. Note that there are several different versions of Windows 7. There’s an OEM copy, which you’re only allowed to install on a single PC. There’s also an upgrade copy, which can only be installed as an upgrade. However, if you picked up a full retail boxed copy, you can install it on your new Windows 8 PC. The only catch is that it can only be installed on one PC at a time, so you’ll have to remove it from any other PCs it’s installed on before installing it on your new PC.
If you already have a retail copy of Windows 7, this is an inexpensive way to replace Windows 8. Before you do this, you should do some research and ensure your new PC’s hardware is fully compatible with Windows 7. If the manufacturer only made hardware drivers available for Windows 8, the hardware may not work properly on Windows 7. Luckily, due to all the businesses standardizing on Windows 7, manufacturers will likely provide Windows 7 drivers for most hardware.