CentOS 7 Installation Issue

[nidishady]

You still have not identified a problem.
What Centos 6.4 installation drive do you think has disappeared?
What ISO did you boot?
What drives do you have attached?
What exactly do you see as a problem?

and here partitions, ISO is CentOS-7.0-1406-x86_64-DVD.iso....and my problem is after manual partitioning option i found three different options 1. New CentOS 7 Installation.
2.CentOS 6.4 for x86_64.
3.Unknown.
what exactly should i need to do in this stage so that i can have fresh CentOS 7 rather than already installed cenOS 6.4 and i do not want to lose windows partitions which are displayed in unknown options the third one...
what are the procedures now please suggest me.
and other pictures as follows:

thank you

[nidishady]

Hello guys....anybody found the solutions to suggest me for best idea to install.centOS 7...without losing windows partitions? Thanx

[jsalpha2]

Well you don't want to delete all the data on sda1. It looks like sda7 is your root folder for Centos6. You should be able to click on it and get more information. You would format that partition and select it to install Centos 7 there making it your new /root partition. It should auto detect sda6 as swap. Your usr and other partitions should stay the same. I'm not giving any guarantees. Maybe someone else will step in and verify my suggestions.

[nidishady]

Well you don't want to delete all the data on sda1. It looks like sda7 is your root folder for Centos6. You should be able to click on it and get more information. You would format that partition and select it to install Centos 7 there making it your new /root partition. It should auto detect sda6 as swap. Your usr and other partitions should stay the same. I'm not giving any guarantees. Maybe someone else will step in and verify my suggestions.

Thanx for your kind information...is sda1 a hard drive i have or its just a partition...well i could not get that option to select that sda7 and format it.How can i do that

Thank you