I am trying to install Ubuntu 11.10 on my HP ENVY 15, however I am getting some problems. When I come to the partitioning section of the installation I am given my 4 partitions that I have. I change the partition of my 450 gb to 420 gb, so that I can use that 30gb space that I free up to install Ubuntu on it. After I do this step, instead of seeing the keyword to the 30gb I see unusable. I have read that there can not be more than 4 partitions somewhere for a UBUNTU installation, but that is not true, because I just installed Ubuntu 11.10 on my Lenovo which has the same amount of partitions as my ENVY ( I do get problems on my lenovo with installing ATI drivers but that is a completely different story). Does anybody have an idea of why I am getting an unusable notification next to my freed up space?