So, recently I came across this problem to reset windows 7 administrator password in a virtual machine! I thought that it was a big deal, but guess what, I managed to reset the password in 10 minutes! So, this is what I did.
I downloaded the bootable cd which is around 5 MB and made that disk as a primary boot device and started my machine! I followed the instructions to reset the admin password to empty password. I unmounted the cd and started the machine and I logged into admin account without password!
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