Keep in mind that the time needed to crack password hashes with rainbow.
Since you can't access those files from within windows, the easiest way to do that is to make a bootable USB with linux on it, boot, then mount the windows partition and copy the files. Oph Vista Special Nt Hash Table Password Hashes With. Windows files that you need You'll need to copy two files from your Windows harddrive (most likely o C: ). Plus you might gain a bit more respect from the students. If you forgot Windows 10 password, please read this part 2. It doesnt work for Windows 8/8.1 or Windows 10. Note: Ophcrack program only works for Windows XP, 7 or Vista. Adding a few more techniques to your arsenal makes you a more well rounded human being. If you cant find tables in Ophcrack boot disc, you need to download rainbow tables from Ophcrack office site. I've also twice been in situations where a lab computer was set up by a PhD student who had since left, but without telling anyone the BIOS password in one case (remove CMOS battery, drain the power by shorting) and NT 4 password in another case (boot using linux, replace the screensaver file with cmd, boot, then wait and you've got admin access). 'Hash Cracking Performance' equals to 'Key Space of Rainbow Table' divide by 'Hash Cracking Time'. Each test uses hashes of randomly generated plaintexts. In my opinion, that's taking things way, way too far, especially in light of OSX user and Linux users don't face the same restrictions (I requested my computer to be delivered blank, so not even the IT staff can gain access without physically accessing my hdd). Hash cracking with rainbow tables on YouTube: NTLM MD5 SHA1 Rainbow Table Performance Two figures below are based on log files of 380 tests.
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