Thank you very much!
I have got it:Ophcrack.

Additional question:Ophcrack runs automatically,but it can not display my password, cost me 2hours but no answers, has anyone used it?Give me a process,please...

After you download and burn the Live CD, the gallery below will walk you through every simple step in the process.


The video will show how to use it, it is quite easy to use but can take some time

[youtube]http://youtu.be/UCYzK7lgbak[/youtube]

Or

Go Here = http://pogostick.net/~pnh/ntpasswd/

Click the Bootdisk button at the top

Scroll down to the Download section and download the lastest version ZIP file

Now extract the.iso file from the downloaded ZIP file and then burn the ISO file to a DVD or USB key drive

Now once you done that follow the instructions from their website on how to use the boot CD/DVD

here is the video

Thanks Uvais, wasn't sure why it didn't work

Just put the codey part of the URL in the YouTube tags.

Oh I see I just put [youtube][/youtube]