looking for some help, related to mysql

[bongos +]

Hi there,

I am having a problem with my newly installed wamp package. I have recently installed Apache, PHP and MySQL on my Windows Vista operating system and Apache and PHP seems to work fine but I am having problem installing or running MySQL in my DOS Window. As far as I understand the problem is rooted in the fact that when I purchased my computer at Future Shop, it was a floor model that had been installed for a Future Shop account already and they didn't tell me that. When I purchased it they forgot to reformat the hard drive for me. When got home and wanted to start up my computer I run into the problem of needing a password for the Admin user account that belonged to Future Shop. At the end I managed to overwrite the password with a program that was able to get into Windows Vista in DOS and managed to get into the account and create a new one for myself and delete the old account from Windows Vista. I had to do this because I had to use the computer for work purposes and I couldn't expect Future Shop to be very quick on fixing my problem, plus they were unable to provide me with a password. Anyway, the password was hard to unlock so I had to delete the old password completely.
Now, I am trying to learn PHP and all the things that come with it so I don't feel like a complete idiot every time somebody talks about it but when I tried to run the install of mysql in a DOS Window, it says this: it is not recognized as an internal or external command, operable program or batch file...
Now, in DOS Window it says: C:\USERS\ADMINI~1\ and this must be the old account for Future Shop because I changed the user name in Windows Vista when I broke inside of it. Now, is there any possibility to delete this account from DOS as well like I did in Windows? I tried to delete this account and it asked me if I really want to delete it, I said yes, nothing happened. I assume this account is protected by some password or something so it makes it hard to even just delete it. But I need to get inside my user account where I can find mysql to install it...Sorry for the long explanation but it is a problem I am unsure of how to solve and I would really like to get on learning but this really keeps me back. Any suggestions from anyone out there?

Thanks in advance.