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I bought a laptop from eBay. The previous owner took the hard drive out, so I replaced it with a new hard drive.
I installed the new hard drive, did a hard drive self test – it passed.
I downloaded a Windows Vista driver and put CD in drive; it still says "no operating system".
In the future please [edit] your question to include more info. Thanks. – slhck – 2013-02-26T12:40:57.370
Without knowing the brand and model of the laptop you will get only generic Change BIOS settings to boot from CD answers. – Bruno Pereira – 2013-02-26T15:59:08.233