Or if it is a trial version, I need it to clean all errors not just a few of them.

BSOD: Copied over /repair/software and now can't login!?
My work computer recently stopped working. When I boot it up, it gives me blue screen with hive message can't find system32\config\system. I went into recovery console but it wanted admin password which I don't have and corporate won't give me. I don't want to send it in and wait to get it back, so I hooked up hdd to a desktop and copied c:\windows\repair\software to c:\windows\system32\config\sof… Put hdd back into laptop and booted up and it boots into windows! However, it doesn't recognize my username/password anymore. What can I do to fix this?
Thanks, but this is not a desktop it is a laptop. It is not the BIOS PW.
I have permission to fix my own computer. I am in IT at my local branch, but happen to work for a huge corporation who doesn't want to give me the ADMIN PW for obvious reasons.

I am trying to repair it on my own as mailing it in will take several weeks for a repair. Again, I do have permission to repair it on my own.

Thanks for the responses.

Interfering with all computer data

I have windows vista ultimate full version on my desktop pc and someone must have missplaced my installation disc and i need it to boot from if i need to repair or reinstall windows vista again! i am not going to pay for another new OS software in a store, all i need is a used disc or can i make a bootable copy off my OS?