I have a Dell 15 that came with Win 8 installed. The HD crashed and they sent a new one & dvd and I installed it. Since I have forgotten my password to get into it now and I want to set back to factory. I have tried to do the F8 which wont work. I put the DVD that came with the replacement HD and it ask for a product key. I didn't get one since embedded in the bios. how can I recovery back to factory to start over.
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