Deleted essential Windows 10 files

Hello,
I recently bought a printer and I tried to download the software but I had no storage. I ended up deleting something I wasn’t suppose to and nothing from my Microsoft word would save. I needed up trying to set it back to factory but I needed more space to even do that. I wiped out my whole computer and yet I still don’t have space. Nothing can be used on the laptop sound, camera, and it won’t even let me open up anything in the task bar. Please help me I just want my computer to be brand new now so I can get back to doing my school work.