Lenovo C364 All-in-One - How(if possible) to change the hardware - CPU/APU specifically?

Hi, I have a Lenovo C365 All-in-One:

Processor: AMD E-1 2500 APU with Radeon(TM) HD Graphics 1.40 GHZ

RAM: 4.00GB (3.45 usable)

System Type: x64 based processor

I want to upgrade the hardware somewhat, especially the processor to a Intel Core i7-4710HQ. Now I have basic knowledge of computers but I do know my CPU is letting down my system.

Is it possible to change the hardware and upgrade it on an all-in-one or do I need to buy a whole new computer?

Also, my computer tells me it has 2 memory(RAM) slots and yet one is in use - 4GB. First of all, I thought RAM was installed in pairs and second, why does a computer come with 2 slots if it can only use one? Plus, it says maximum usable capacity: 4GB, what will happen if I install more?

Thanks.

Added (1).
Lenovo C364 All-in-One - How if possible to change the hardware - CPU APU specifically - What my computer tells me about the RAM installed.

Johnathan

All-In-One computers are laptops attached to the back of a monitor. All that is upgradeable is the RAM and hard drive. Everything else is "what you bought, is what you'll always have".
So, if you want something "better" then you will need to purchase a better computer.

geek-in-training

I would build a pc the i7-4710hq is a laptop processor there are some good gaming laptops that comes with that intel processor check with alienware, MSI, ASUS, it seems like one ram slot is used and can't install ram pass 4 gb on your unit

starpc11