So here is a summary of what I have been doing today.
Dual booted a laptop (windows 7 64 bit home & ubuntu 14.04); diferent partitions + a data partition.
had to install grub manually (done right)
decided to go back to windows(ubuntu was not for my technologically challenged father)
The MAJOR hiccup: deleted the partition with Ubuntu=> no bootloader
tried reinstalling ubuntu to get grub working again.(failed)
Managed to get a windows repair disk and fixed that
So NOW I realised that the ubuntu installation was done in the data partition.
windows cannot see the ubuntu partition or the missing data.
I only have a free version of minitool right now, and I realise that I am more of a noob than I thought.
Can anyone please help me recover at least part of the data?