I've replaced the Hard drive yesterday.
Power on, press esc key,
F11, System Recovery
Asks for disc
Disc in
Loads Windows files
Install Wundows Screen appears, i.e. Language to Install etc
Press Next key
Install Now screen appears with sub menu, What to know before installing Windows & Repair your Computer
Press Install now tab, set up is starting
License terms screen appears, check accept box and then Next
What type of installation messae appears, Upgrade or Custom (advanced)
Click on Custom tab, Where do you want Install Windows message appears with 3 options and Disk O Partition 1 highlighted.
Click next
Installing Windows
Loads approx 9% then Installation message appears:
" Windows cannot install required files. The file may be corrupt or missing. Make sure all files for installation are available, and re-start the installation. Error code 0x80070017"
IS this down to bad download as per your earlier message?