When I downloaded ubuntu 12.10 : it showed partion and file on contol panel. This time it did not let me choose for partion. This one over took my window 7 operating system, even on openig computer the choices is given by Ubuntu on purple screen.
I am afraid of going to original factory setting. There is SAS, SPSS and SAP progam which I do not want to loose. I am planning to upgrade window 7 professional.

As Panimuni said Windows has monopoly and will wipe wite ubuntu: I will try this.

Anyone else facing similar problem or it's me who did not install proper way and invited this porblem.
Thank you.