So I bought my Acer AX3400 and the hard drive had so many partitions. This bit of software is amazing and very simple for noobs who find partitioning complicated. I formatted my 1TB HD and created a new partition table and installed fresh windows 8.1.
Here is a screen shot of how simple it is.
(This is not my HardDrive btw)
Ive included the links for the software and my version of windows 8.1 pre-activated, so if you fancy a change have a go. Its great.