Error 0xc000000f!

Hello all,

My Gateway laptop running Windows 7 Home Premium (x64) recently crashed, and when I rebooted it, it displayed this:

Windows failed to start. A recent hardware of software change might be the cause. To fix the problme:

1. Insert your Windows installation disc and restart your computer.
2. Choose your language settings, and then click "Next."
3. Click "Repair your computer."

If you do not this disc, contact your system administrator or computer manufacturer for assistance.

Status: 0xc000000f
Info: The boot selection failed because a required devices is inaccessible.

The thing is, I don't have a Windows installation disc! I was just browsing the internet when my laptop crashed, and now I can't do anything; repair your computer, safe mode, boot from last known good setting, etc. all result in the same error screen.

Can anyone help me?