Server 2008 R2 Administrator Password

I setup a Server 2008 standard R2 with Hyper V.  I have forgotten the Administrator password on both the local and virtual side.  Both the local and virtual have the same Administrator password.  I do have my own account on the local side and I am in the administrator group. I understand from some of the post here that I can change the Administrator account from my account, but is there a way to bridge from the local to the virtual side and change the Administrator account there using my account?