Installation from windows 10 to windows 7

I have installed windows 10 in my pc. But now need to install windows 7 on it. I download on USB boot but did not worked I also make a partition of 900 Gb each but in vain and it shows me the following error:

Windows setup cannot find a location to store temporary installation files. To install windows make sure that a partition on your boot disk has at least 686 megabytes(MB) of free space.

Error code: 0x80070490

Try disabling Secure Boot in UEFI settings, as per this answer. Then change your boot priority to USB device.

The error 0x80070490 (ERROR_NOT_FOUND) could also mean that your installation files are missing or corrupted, so please verify them.