Computers and their software keep changing. The companies that sell computers would like you to buy more computers even if you have one already. Who in your family will want to buy a new computer next?
Talk to that person in your family and find out what they will want to do using the computer. What are their needs and wants? What preferences do they have for things like the display, the keyboard, the memory, networking, printing, sound, etc. Take notes about what you learn from them about their requirements.
Do some research about what computers and peripherals are available. Find out what their capabilities are, and make sure they match what the person wants. Try to find two or three alternatives for each component, and look for advantages and disadvantages. Find out prices available in Ottawa or delivered to Ottawa.
Include the operating system as one of the components that you investigate. Again, identify two or three possibiliites, find out capabilities, advantages, disadvantages and price.
Create a web page to present the information you have found. Your web page must include both the person's requirements and the computers, peripherals and operating systems that you have investigated. Organize the information in a table. Include links to other websites that contain detailed information and how to buy the equipment.