Hello, I have a 80GB harddisk in my laptop, which is divided in 2 partitions, C:and D:. Today I bought an external drive and transferred all of D:'s contents to the external drive. Now, I'd like to remove the D: partition and take all it's space back to the C: one. I'm new to this thing, I've tried googling but I've seen some cases where the contents of both patitions were erased... So which free or trial program can I use to make this quickly and without risks?