How do i restore an old backup to my iphone 5 from Windows 8

I updated the software on my iphone 5 and got half way thru the restore of backup and my laptops battery died so when I turned it back on and started again I just clicked resume well apparently when my laptop died it backed up my empty phone so i restored the factory settings by accident and now I cant figure out how to get to the back up at 8:05 instead 9:30!!

When i go to Itunes it only shows the last two backups one 10mins ago and one at 9:30pm and I need the one from 8:05pm. Please help its got irreplacable photos of my baby on it.