Please follow the instructions in post #10 to create a bootable USB flash drive, you've stated that the laptop won't boot into normal mode.
First thing (you'll have to do this from another computer) create a bootable USB flash drive with the W10 ISO from the first link I posted, plug that flash drive into a USB port on the laptop in trouble and reboot.
While it's booting up there are "F" keys, or combination of other keys that will allow you to choose a one time boot option. This is not the BIOS, this is a different screen. When it's booting up repeatedly press the F2, F8, F12, or whatever key it is on your laptop until you get that one time boot option choice.
Figure out either by trial and error, or manufacturers documentation, which key(s) give you a choice of where to boot from, you'll need to choose USB.
After you boot from the USB then allow it to upgrade/install on the laptop from the W10 bootable USB flash drive you created. That flash drive is also useful for a repair install since it has the iso and doesn't depend on the computers hard drive to start up.
P.S. to the best of my knowledge W10 will be free up to and including July 29th 2016, it was made public that it was free for 1 year after RTM which was July 29th 2015.
P.P.S. when the computer is upgraded to W10, there is folder named "windows old" that has the previous OS, it is deleted after 30 days. If a person decided they wanted to go back to it they have up to 30 days to revert back. Some have had difficulty reverting, IMO it's partially due to MS doesn't want users to go back, they want everybody on W10.
Edited by CmmTch, 22 May 2016 - 10:25 AM.