Prof. John C Nash wrote:
All the partitions were visible in Disk Management in Windows 7. The issue is that there are 4 primary partitions, therefore no slot for putting in any other OS.
Linux does not need a primary partition.what is on the 30GB logical partition? I would be tempted to delete sda5, shrink sda2, and grow sda3. Replace sda5 if required, else use sda3 for linux.
-- sg