How can I Factory Restore my Windows 8 HP laptop when I am missing some files?

[Alura Rosenbaum]

I'm missing my product key cause my brother got me my laptop from ebay.
Can someone please tell me how I can recover the missing files without a product key so I can factory restore my laptop?

 

[COLGeek]

What were you doing when you got that error screen? Have you tried to perform the factory restore yet?

BTW, here is a useful link from HP for activating your OEM install of Windows 8.

http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?sp4ts.oid=5230510&spf_p.tpst=kbDocDisplay&spf_p.prp_kbDocDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c03486254-4%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken

 

[bryonhowley]

Does the laptop not have the COA attached to the bottom of the laptop? There should be sticker on the bottom of the laptop with the key on it.