I am new to ubuntu.

I was using windows 8.1 and wanted to install ubntu 14.04lts.To do this i had 4partitions C,D(Dbase),E(Study),F(Media),I and a free space of 26GB.By using universalusb installer,i made a bootable USB and restarted the system which booted into ubuntu installation media.I disable fast boot by power options.

I clicked on install ubuntu,and clicked "Something else" to install.
I had this 26 gb free space.I used 2048Mb for swap area and rest for "/"(not gave any memory for '/boot') and completed installation.Then i removeed the usb and restarted.It took me into ubuntu without any options to choose.There was also a black screen before booting into ubuntu.I thougth that installtion was not sucessful and reinstalled ubuntu by usb and clicking on "reinstall ubuntu".Till now i did not check my partitions.After reinstallation,a boot menu appeared with Ubuntu,Advancedoptons, no windows.

I checked the files and there are no hard disk partitions.

I tried boot repair and it gave me this url:
http://paste.ubuntu.com/11798860/

I tried using windows "bootsec /fixmbr" and no use.
Is there any way to get my windows back?

When run this sudo fdisk -l:

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sda: 500.1 GB, 500107862016 bytes

255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes

I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1               1   976773167   488386583+  ee  GPT

Partition 1 does not start on physical sector boundary.

And when I run testdesk tools deepersearch with intel/pc partition I got this:

http://imgur.com/ejajvQI

I can see my parttions : System reserved,Dbase,study and media.
Now what could i do?Please help me recover my partitions?