windows – Help me, delete my operating system

Very good that such? I had a small problem: in the Windows Disk Manager, I had a C partition (only) and I wanted to shrink the volume to create another partition. start my computer, the data is, but I do not get the operating system
I have already entered diskpart and I have seen the disks and all disks are of type "Main"
I have partitions 1 and 2 that say "Main" and a partition 3 that says "Recovery" … help me please, I'm desperate