I bought a Dell Inspiron 5521 laptop a few days ago that came with Ubuntu preinstalled.

I haven't used Ubuntu yet, and I don't have any experience in using it. I wanted to install Windows 7 64-bit on my laptop alongside Ubuntu, and made two bootable USB drives with Gparted and Windows 7. There wasn't a suitable partition on my laptop in which I could install Windows 7.

I've read the instructions for using Gparted to create or manage my hard drive. I inserted the USB, booted from BIOS, and followed the procedure in installing Gparted. Then I entered Gparted, and the following error occurred: Librated error when Creating partition table. It asked me to click on either OK or Cancel. Either way I had my hard disk shown to me in the user window, in partitions that were made by the manufacturer:

Partition   File sys Label             Size                 Flags
/dev/sda1   fat32    dellutility       300.00 Mib           diag
/dev/sda2   fat32    os                3.00 Gib             lba
/dev/sda3   ext4                       912.46 Gib           boot
/dev/sda4   extended                   15.75 Gib
 (had a subpart) /dev/sda5  linux-swap 15.75 Gib

...and a option to switch to dev/sdb that's unused and of capacity 3Gib.

I've used the biggest partition 912.46 Gib, and tried to reduce its size, and clicked OK. Then when I tried to make a new partition, it said it can't make any more partitions, no more than a maximum of 5.

I would like to keep Ubuntu and slowly learn, but I also need to use programs that work in Windows.

Thank you for taking the time to answer my question.