Windows 10: Wipe Harddrive and Partitoning when installing Windows from Live USB

I messed up my drive Partitioning Dualboot etc. and now I'd like to reinstall Windows.1. The question now arises if Windows installer will delete my unessacery partitions?2. And if I need a new Product Key for reinstalling windows on the same device?

:)

 

Installing windows off of a USB stick

Step By Step from vista:
From admin cmd prompt

1. diskpart
1a. list disk
2. select disk 1 (replace 1 with your usb drive)
3. clean
4. create partition primary
5. select partition 1 (replace 1 with your usb drive)
6. active
7. format fs=fat32
8. assign
9. exit

Copy Windows Vista's DVD ROM content to the Flash Drive

xcopy d:\*.* /s/e/f e:\ (d being your vista cd and e being your usb stick)

And that's it, boot off your usb disk

 

windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx

 

Wipe harddrive

It is possible for Windows to cause the computer to shutoff and reboot randomly, but that is more likely a hardware problem. To wipe the hard drive and do a clean install, boot the computer from a Windows 10 installation USB flash drive or DVD. When you get to the option to do a custom install, select that option. The next screen will list drives and partitions. Delete every partition on the drive you want to install Windows on, then highlight the unallocated space and click next.