HELP! My computer say NTLDR is missing and i lost my recovery disk 2?

So one day i be going to do my home work and i clicked on Mozilla Fire Fox and then it froze and two icon dissapered it was the Mozilla Fire Fox and the Recycle Bin. So i unpluged my computer because it wouldnt tolerate me restart it and next article you know it says NTLDR is missing and i dont own the "recovery disc HP 2". WHAT CAN I DO TO FIX THIS! * i am typing this on my fathers computer not mine because it wont permit me* if you have a "NON-VIRUS" *meaning not have a virus* link that will help out me download HP recovery disk 2 then please put the knit.

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"> If you have Vista, when the HP logo comes on the peak press f10 to start the recovery console. If you don't have Vista, you'll entail an operating system disk to reinstall it.

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