The OS originally was 8.1 (64-bit) but I downloaded the windows 10 upgrade.
My computer would not start, and the screen showed the "boot device not found" error message. So I followed instructions from the HP website about this problem.
The QUICK SCAN results: SMART Check: passed, short DST: WARNING
EXTENSIVE SCAN results: SMART Check: not installed, short DST: not installed
After following more procdures from the HP website, and attempting a hard reset (which did not work - error message "boot device not found" was still all that appeared upon start up), I was instructed to use recovery media.
While using recovery USB, the process gets to the "factory image recovery preparations" part, but before it completes an error message appears that says:
"Copy File Fails
The instructions that came with the recovery USB say when this error message appears that I should bring up the "Manufacture menu, and select option 6: Wipe All Sectors" before restarting the recovery procedure again - how do I bring up the Manufacture menu to wipe all sectors?