Upgrade to Snow Leopard, password reset??

[Brysley]

I took my laptop in to a shop to have a new hard drive installed and the guy in the shop upgraded me to Snow Leopard. I then tried to use migration assistant to get my files back off an external HD and it's telling me my password and/or user name is incorrect. Is it possible the guy in the shop changed it? Is there a generic password when you reinstall things? Or do I need to restart my Macbook using the old Leopard disk?
Any help gratefully received.

Cheers

 

[GfulDedFan]

I then tried to use migration assistant to get my files back off an external HD and it's telling me my password and/or user name is incorrect. Is it possible the guy in the shop changed it?

This is possible. I would contact them and inquire.

 

[iLog.Genius]

You can use the Leopard disc or Snow Leopard disc to change your password.