I am using Microsoft Visual C++ (no microsoft barbs please, its the one we need for my course), and am having real problems with the debugger.

I couldn't get the debugger working so I burnt my program and took it to school and the teacher taught me how to use the debugger (it worked fine), but now that I am at home the debugger will work for about 2-3 lines before going into this ->
02F7251E jmp 02F7256B
02F72520 mov eax,1
etc... etc...
From here I have no idea what is happening and can do nothing short of stopping the debugger, please note that it didn't do this on any other computer (tried 2 teachers computers).