Password reset Windows 7

I installed Parallels 10 on a different partition on my Mac with Yosemite.
I copied the virtual image from Windows 7. It booted but refused my password on login. I don't have a password reset disk and tried to make one on my other partition with 10.9 and Parallels 8, but I got a message "wrong password" although I used that password to login.
Please help.
Thanks for reading and TIA.