@Everyone: I think people are getting off track on what
qamarmiqdad is actually trying to do. He is trying to recover lost passwords for Windows computers in his IT environment. And it appears he is trying to use Safe Mode Command Prompt to do so. Sure is the long way around I'd say. I spent 20+ years in IT, and there is always another way.
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qamarmiqdad: Have you tried going to Standard Safe Mode from another computer in your shop? If so, does it work correctly? Perhaps the computer you are using is hosed or the hard drive is bad (have you run complete hardware diagnostics on it?). I see lots of Win7 computers with failed hard drives as they are 2-4 yrs. old now..Continuing to try and solve a problem on only 1 computer is like banging your head against the wall; your head will fail before the wall will!
What tool are you trying to use to do Password Recovery? You never mention that. Or the process you are attempting once you arrive into Safe Mode. We can't tell you how to recovery windows passwords here in the forums, but there are several excellent programs that can help you do that. The latest I found works really well on new Windows computers such as Vista & Win7 is the OPHCRACK program; a free download.
You can also use assorted utilities on the UBCD linux based toolset from Benjamin Burrows; another free download. Many IT shops and independents such as me use this tool. There are several programs in there that can do this.
Lastly, if none of those work, you can always use the tried and true NT Offline Registry Editor, but it's pretty much only designed for advanced computer experts, so you might have to get some of your more seasoned IT co-workers to assist you. (I teach Technicians going for their A+ certifications how to use this tool). They might even loan you one of these 3 programs I mentioned for a price--perhaps a cup of coffee!
Good Luck!
BIGBEARJEDI