Re: Dual Booting with Windows 7 and Ubuntu. 4 Primary Partitions max?
The way partitioning is generally done is to create a single Extended partition (which is a Primary) and, inside that, create two partitions, one for the Ubuntu filesystem and the other for swap. That will give you three partitions for Windows (boot, OS, data) and one Extended that contains the Linux partitions.
Please read through the materials below BEFORE you launch into partitioning:
If you decide to continue on with dual-boot, then use ONLY the Win7 Disk Management utility to shrink the Win7 OS partition to make room on the drive. Win7 is very finicky about its OS partition being messed with from "outside" with other tools -- like GParted. While it may be OK, it's more likely to result in filesystem corruption, which will then render Win7 unbootable.
And, after you create some free space, do NOT format it using the Win7 Disk Management utility; leave it as free space.
Then BEFORE you install Ubuntu, use the Win7 Backup feature to create and burn a Win7 Repair CD. You might need this later if the dual-boot install corrupts the Win7 boot loader.
When you then install Ubuntu, use the "Something Else" option to allow Manual Partitioning.
Ubuntu 16.10 Mate, Mint 18 Mate; MS Win 8.1, MS Win10 Pro.
Will not respond to PM requests for support -- use the forums.