Need some help, something wrong with my wallet bitcoin won't start

[BOARBEAR]

My OS is windows vista x64

While my machine is mining, bitcoin crashed(I don't know why).  I have to close it.  After that, I won't be able to start bitcoin.  I get this message when I try to start bitcoin:

after I click ok this pops up

click ok again and this pops up

That's it.  Bitcoin won't start anymore.

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[drawoc]

Go to: C:\Users\[YourUserName]\Appdata\Roaming\Bitcoin
Copy the file "wallet.dat" somewhere safe. (This is IMPORTANT)
Delete everything in C:\Users\[YourUserName]\Appdata\Roaming\Bitcoin
Copy wallet.dat back to C:\Users\[YourUserName]\Appdata\Roaming\Bitcoin

Restart the Bitcoin client. You'll have to wait a while for it to re download the entire blockchain.

[TeraPool]

Yup.

You turned off your computer and/or bitcoin without letting bitcoin properly shut down is most likely the case.

Remember, bitcoin is still in BETA coding stages, so it's not perfect, but it's getting there!