I had my computer since Windows Me. Some years now I install Window Xp. My brother tried to format the pc and install again the Xp because the pc was lagged many times. He said that the cd of Windows Xp not recognized. He try some restarts but nothing. Sometime I open the pc after the try of my brother and I had a choice to select "Windows Xp professional" and "Windows (default)". I chose the first one and then something happens - i didn't understood- black screen and white letters said something about a problem, and then i press esc and it restarted and that menu appears again and I chose the second choice. It began Windows Me -maybe it was safe mode. I do my job and I closed the pc. Now If I open my pc I see a message "Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key_" I already read a topic with something like that message but I didn't understand anything. I insert the boot flopy of Windows Me to help me. I noticed that when I press any choice before the document help or A:\> appears this: "Windows Millennium Edition has detected that drive C does not contain a valid FAT or FAT32 partition." and then It appears some causes to fix it but I really don't understand. Is this something or it doesn't matter with Windows Xp? My brother of course he blames me about all this and he can't fix it. I would be greatfull if someone explain me step by step what to do.