while setting up eindows, error occured "the selected partition is GPT type"

[winter.stroke]

My friend gave me his LENOVO Ideapad S4oo to turn his OS into win7 from win8. with making some changes in UEFI settings, I got In track. I deleted all existing partitions except One as need the documents in it! But when I select the partition or try to make a new partition.....It does not work. It shows "the selected partition is GPT type" message!

Then I tried to look for solutions over internet! But all it offered me was Solution by command prompt or third party software!
But the problem is I don't have any OS in the system. So I cannot go Through those process. Now what can I do??? 

Help me!!

[Mulreay]

You need to reformat the drive for UEFI mode.

[patio]

You don't need an OS installed to fix it...a 3rd party app such as Easus Partition Manager will do it...
Follow their guide to create a boot CD...
Remember to set CD as 1st boot device in BIOS...