Windows 10 reinstall. How to get troubleshooting page on BIOS?

I bought a new laptop, it’s working fine but for the past few days, I faced some issues like lagging and not working perfectly so I’m trying to completely reinstall Windows 10 Home on my laptop.

I’m using Lenovo Ideapad 110. I downloaded the ISO file and installed it on a DVD. I can’t get it to run. I can’t change the boot order because there is no option for installing from a DVD. I can’t find anything online to tell me what keys to push to get to the troubleshooting part so I can at least clean it up by going back to the original.

However, this machine originally was a Windows 7 machine so I’m not sure what it would take me back to which is why I’m trying to completely install Windows 10.

I tried to search for it, but I can’t find anything else about this one.
Any ideas are welcome.