Help! Ubuntu 13 installation failure

jsjs

Journeyman
I installed ubuntu 13.04 a few days ago. after that i removed ubuntu (why?? i dont know). it was as follows - firstly i deleted the partition on which ubuntu was installed and merged it into another partition(Local Disk F). then i removed grub using easyBCD. and at last on F there was a folder called ubuntu which i deleted.
Now when i am trying to re-install ubuntu it gives an error saying "files from previous installation already present on F:\Ubuntu". But I dont see any such folder.
Plz help. what to do?
 
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