deleted system partition...

i have laptop sony vaio vgn cs 320j ...
i had installed windows 7 ultimaye 64 earlier...
but i have already formatted that one..now no os on pc..
i also deleted by mistakes syaytem partition..
i dont have driver cd..

what to do???

driver are there on sony website...but which one to download i dont know for booting my windows???

at present my pc on non-bootable mode..

Sony eSupport - VGN-CS320J/P - Support

please help....

Hello swap2511 and welcome to Seven Forums.

Did you also delete the hidden recovery partition installed at the factory by Sony? If it's still on the hard drive you can restore your computer to factory specs. This recovery guide should be fairly close for your model Vaio computer.

https://www.docs.sony.com/Release/VGNT300series_Recoveryguide.pdf

You might also be able to recover the deleted partitions with a free utility called MiniTool Partition Wizard.

How to perform lost partition recovery and deleted partition recovery under Windows? Partition Recovery Help.

Or you might consider doing a clean reinstall of the operating system and removing all factory bloatware. If you need an installation DVD step 1 explains how to get a free, legal copy. You would download and save the ISO file for your version of Windows 7 (perhaps to the desktop) and then burn the ISO file to a blank DVD.

http://www.sevenforums.com/tutorials/219487-clean-reinstall-factory-oem-windows-7-a.html