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When I boot my HP laptop, it shows "missing operating system" and it restart, this repeat over and over.

Pressing F11 for the Recovery Program don't works as it also show the same error - "missing operating system"

I boot up the laptop with my Win7PE CD, but I can't access my C and D drive through the file explorer and CMD

No CD/DVD was supplied for the laptop when I bought it.

My laptop is pre-installed with Windows Vista Home Premium 32 bit. I would like to ask: Can I format my C and D drive? Will the hidden OEM partition been formatted? If I can't format my laptop/the formatting action will destroy my OEM partition, what should I do?

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In the BIOS, is the HDD detected? –  Miles Hayler Oct 9 '12 at 8:28
    
@Miles Hayler BIOS can detect my HDD –  GaryNg Oct 10 '12 at 10:10

1 Answer 1

You need to boot with Windows Vista/7 disk, and repair Windows.

Here is what you can try.

Boot the Windows 7 or Vista DVD, choose Repair

In the System Recovery Options dialog box, choose the drive of your Windows installation and click Next.

In the System Recovery Options dialog box, click Startup Repair.

Open a Command Prompt.

Enter the following commands:

bootrec.exe /fixmbr

bootrec.exe /fixboot

bootrec.exe /rebuildbcd

Press Enter.

Also see this link Microsoft Support

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It cant detect my drive –  GaryNg Oct 10 '12 at 10:11
    
Are you sure is your hard drive healthy? Can you check it in Bios? Whether your system can detect your H.D.D? –  Mohammad Hassan Oct 10 '12 at 10:38

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