Hard Drive Not Detected By BIOS or Disk Management

[mrawesomeness]

I don't know much about computers, so bear with me.
I'm currently using a Windows 7 PC built by a friend of mine, but starting yesterday, its been acting up. The problem is there used to be two hard drives I can access, Drive B and Drive C.
When I boot up the computer, BIOS only detects Drive C (if I'm not mistaken), and Disk Managements as well. I realized this when all the programs whose targets are on that drive are all broken on the desktop.
So Drive B doesn't show up anywhere at all.
How can I fix this problem? Thanks.

 

[nikorr]

R.I.P.

 

[mrawesomeness]

Aw poop. Ok thank you all for your help anyway, much appreciated.

 

[nikorr]

Happens all the time.

Back up is is the solvent in this sorrow momentum

 

[mrawesomeness]

Best answer selected by mrawesomeness.

 

[Dark Lord of Tech]

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