Removing Everything Including Windows
Is malware on your computer causing a lot of trouble? If it's become a real mess you are wondering, "How do I delete everything on my computer?"
If you wish to delete everything from a non-system partition, you can format it, or you can manually delete every folder. To format a non-system partition, open Windows Explorer (press Win Key + E), right-click the partition you want to format (i.e. C, D or other) and press Choose Format. In the new window that opens, press Start to format the partition. To delete every folder manually, select each of them and press the Delete button.
If you have decided to get rid of everything from your Windows partition (The system partition), you must format it. To do this, follow this:
Get a Windows Vista setup disk and boot up your system with it. Windows Vista setup will walk you through many options until you get to the screen where you are asked to choose which partition to put Vista on. To format the drive, just click the button at the bottom that says Format.
To format Windows XP, boot your computer with the Windows XP setup CD and after some time, a blue screen will appear. There will be a box showing all available drives and the partitions that exist on them. Use Up and Down keys to highlight C: partition and then press D. When the next screen appears, press L to complete deletion. You will be taken back to the main blue screen and in place of C:, Unpartitioned Spacexyz will be shown. Again, using the Up and Down arrow keys, select this and then press C to create a new partition. In the next screen, you will be able to enter a partition size. You will be taken back to the main screen and this time “C: Partition1 [New (Raw)]xxx" will be shown instead. Highlight this and press Enter. The next screen will let you choose file system, highlight your choice and press Enter to start the process of formatting your partition.
Windows 8 allows you to "refresh" your computer as a possible solution before you actually go to a full restore. If you do have to launch a restore, your computer will prompt you through a few screens and then it will finish on its own.