boot failure of Acer Aspire 6920G

Hi, all.

I have an Acer Aspire 6920G. It is not booting properly.
When I turn it on, it goes to the recovery screen, but the repair option is not working.

So, I am doing the safe mode, but it get stuck at
Loaded:windows system32 drovers crcdisk.sys.

What can I do?

Thanks in advance...