Problem Installing Windows 10 From windows ~BT folder

hi people need some help here. I have the following pc:
Hp / intel 1terabyte hdd.
windows 8.1 bing . genuine windows

I click on the setup file in the windows ~ Bt folder to setup windows 10 and I get this message

Install windows
windows was unable to locate required installation [boot.wim].
Verify that the installation source is valid, and restart the installion.
Error code: 0x80070002

Is there away of deleting everything in the windows~BT folder and install windows 10 directly ?

Download this: Windows 10 Download and put it in a USB/DVD then run setup from there.

NOTE: Before upgrade to Windows 10. Make a backup image of your current Windows first. Just in case something goes wrong.

Use: Macrium Reflect Free to make a backup image.

Thank you all for help