hdd problem while doing os

[mahesh alavala]

yesterday i did hdd partion deletion while doing OS so finally it got two partions one is unallocated and another one is my name aftern that i am unable to do

 

[i7Baby]

'doing' OS? Installing Windows?

See http://windows.microsoft.com/en-au/windows/installing-reinstalling-windows#1TC=windows-7 for help.