PC will not play the game

Yo,

Just got a PC but having major problemo with it. Dont know the logon stuff to get on the PC. The guy who sold me the thing says it came without help and will not sort me out. Looks to be Windows 2003 on the screen when it starts. It is also quite a big ‘n’heavy PC. Bigger than my last one.

How do I get on the PC?

Have I wasted my $350 then if there is no help.