i have a windows 7 computer.it was slow so i download it windows vista from the internet, after that i realize it didnt work and i decided to use programs i didnt use. i do not know what i erased. Now i tried to restore my pc to the time that it worked but the system restore doesnt work. i try to use the internet and it does not let me. I need help me i dont have the cd to restore it. Please i really need help.