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The first application’s called Ophcrack. It’s a free and open source Windows XP and Vista password cracker that uses rainbow tables to crack the password. It does involve cracking and a bit of brute force so speed and effectiveness isn’t a 100% guarantee. Here’s how to use it.
- Download an appropriate version of Ophcrack.
- If you downloaded the LiveCD version, burn the download to a CD.
- Download the rainbow tables (this will provide a library of the possible combinations to crack the password).
- Run the software. It has a graphical user interface that’s quite user friendly to crack the password.
- Use the rainbow table if prompted.
The other options if Offline NT Password & Registry Editor. Unlike Ophcrack, this nifty app can even work around Windows 7′s password authentication. Here’s how to use it.
- Download the ZIP file. This contains a .ISO file so you have to burn it to a CD. An app like DeepBurner will do the job quite nicely.
- Boot the computer using the CD.
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