Downgrade from win 7 to win xp
How to downgrade from win 7 to win xp , tried to do using win xp cd or formatting, not able to go through, does not allow me to go to bios, after disconnecting hard disk only allows me to go to bios, but with hard disk connected to able to go ahead, pressing F2 for setup, just say entering, but doing nothing, hard disk red light doing nothing








