ubuntu to win 8

Then go to advanced partitioning tool. ,

Then go to the partition creation window. Can stick with installer choice or change it.
Create boot partition

Create Boot Partition: The first partition will be mounted at /boot. Notice that “Primary” is selected, instead of “Logical.” I allocated 250 MB of disk space to it, which is about the default in this latest edition of Ubuntu. I also chose Ext2 as the file system. That, is also the default for the boot partition in Ubuntu 12.10
http://www.linuxbsdos.com/2011/09/18/guide-to-disks-and-disk-partitions-in-linux/
http://www.linuxbsdos.com/2012/11/03/ubuntu-12-10-installation-and-disk-partitioning-guide/

7. Create More Partitions: After the boot partition has been created, you will be returned to the main window of the Advanced Partitioning Tool. To create the remaining partitions, select the free space, then click the “+” button. This step has to be repeated for the other partitions too.





8. Create Root Partition: The next partition will be mounted at /. I allocated 15,000 MB, or 15 GB to it. And I used the default file system. Because there is just one primary partition left, the installer will create it and subsequent partitions as logical partitions. And there’s nothing you can do about that. MBR-based partitioning schemes are limited to a maximum of four (4) primary partitions. OK.