Windows 7 partition deleted

[Brainymidget]

When trying out Ubuntu on my computer, I accidentally deleted part of the Windows 7 partition.
In Ubuntu installation, I chose to partition away 200 GB of my 600 GB hard drive and format that as ext3. After doing this, the other 400 GB went from showing up as NTFS to "Unusable".
Is this completely deleted or is it possible to recover it? Not worried about files as I backed up a few weeks ago so I don't have anything important lost, I just want to get Windows 7 reinstalled without having to buy a new license.

Additional Info:
Computer is Hp dv7-4285dx running Windows 7 Home Premium
HP has recovery software but it was unsuccessful when trying to do a restore.

 

[theog]

   Information

We always assume you have made your Recovery Disks using the OEM manufacturer's Recovery Media Creator app the first day you had your new PC.
& made the Startup Repair CD.
startup repair disc-create
​

Did you make the OEM manufacturer's Recovery Disks?


How to make HP Recovery DVD disks:
Recover Windows Vista Operating System Using HP Recovery - HP Customer Care (United States - English)

How to make HP Recovery USB disk:
Creating a Recovery Disk on a USB Flash Disk HP Pavilion dv6700z CTO Entertainment Notebook PC - HP Customer Care (United States - English)

or
You can Order HP Recovery Disks from here:
Compaq Mini CQ10-500 PC series -  HP Notebook PCs - Order Recovery Discs for Windows 7, Vista, or XP - c00810334 - HP Business Support Center

 

[Brainymidget]

Is there any way to download the recovery disks rather than order them from HP?
I made recovery disks but they are at home, and I'm off at college, and it would take a while to get them sent.