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The error has nothing to do with the Android emulator -- it's a hard failure of the hard drive.

You'll need to replace the hard drive with a new one.

If you need a part reference, post the full model number (Inspiron 3141, 3339, etc.).

it's an inspiron 3000 , and what about my files , how to get them ?

You'll need a new 2.5" SATA hard drive or SSD.

If you don't have a backup, you'll also need to weigh the cost of data recovery against the value of the data.  There's nothing you can do with a drive the system can't see (which is what that error indicates), but there are data recovery services that can work wonders.  A basic recovery without a lot of manual intervention will run in the $500-600 range, but if the drive is severely damaged, it can easily escalate well into four figures.

That error indicates an "incorrect status" of your optical drive. I suggest you run the Dell diagnostics on your drive. To test your CD/DVD drive from the utility partition:

1. Reboot your system. When you see the Dell logo, hit F12 to enter the boot menu.

2. Select Boot to utility partition.

3. Select Test System.

4. Select Custom Test.

5. Use the arrow keys or mouse to select your CD/DVD drive.

6. Insert a CD or DVD.

7. Click Run Tests.

8. Write down any error messages.

No, it does not.  2000-0151 refers to a hard drive not found -- it's the hard drive that has failed.