Stuck at start screen

Hello,

i tried to do partition with gparted from ubuntu from usb drive and then install ubuntu in D-drive. but i cancelled it. then my NTFS partition is not recognized as ntfs partition when i logged into windows. then i combined the unallocated space to the d-drive. then i am unable to log into my system. im stuck at lenovo start screen. it doesnt beep automatically but beeps if i press any key..so what can i do forr this?please help me..