I want to install my windows vista ultimate. It asks where I want to install it out of these 2 places. Disk 0 Partition 1 Backup - Total Size = 7.8GB, Free space = 1.7GB, Type = Primary Disk 0 Partition 2 HDD - Total Size = 290.3GB, Free space = 172.9GB ,Type = Primary The backup partition is a recovery back up so I can set the pc back to factory settings. The second partition is my current work space with all my data on it and its windows xp. Can I a make new partition so I have XP with all my data onit and windows vista on the same Hard drive and have it so I choose on boot up which OS I want to load. If so how. http://support.microsoft.com/kb/309000/ ok I found this but I'm stuck. I'm not sure what the difference is between Primary partition, Extended partition, or Logical drive and which one do I need to create for the windows vista. Also I will need to specifiy the size in mb of the partition I create it says but I don't know what size. I can't seem to get up the new partition wizard neither. Thanks for your time.