I installed ubuntu 13.10 alongside windows 7 on my laptop and now I have two bootable windows partitions sda1 and sda2. There is a third partition for windows sda3 as recovery. is this normal after installing a second operating system?
It is normal. If you ever want to format your laptop, you can enter that third partition. It is the best way to give format to your laptop because this process include all drivers that your Windows needs. Have in mind that recovery means erase everything of your hard drive. Before doing that back your files up.