How to reset hard-drive partitions into original state?

Hardware HDD's & SSD's
1

Hey, i have created a bunch of partitions with my hdd but now i want to combine them all into one so i can have it in factory settings. i was thinking about doing a fresh install and wipe of all data so losing any data is not a problem. Is there any boot tool or something like that which can help me fix it?

http://gyazo.com/82b71031c0060263d2f0007671839ef1

Ignore the D drive because that is a secondary hdd. i also have some unallocated space which i cannot combine with my c drive or anything. i have tried some tools which i downloaded or used the windows built in ones but it dont work. Any advice?

2

During OS install you will be able to delete the partitions, giving you the entirety of your hard drive as unallocated space.  You can then create a single partition and install your OS to that.

3

OK, but will it let me combine partitions and shet?

4

Just delete them all, then make a single big one.