Help redo my laptop!

How do i delete everything off my computer like all and just start over fresh?!? too many viruses are getting on and a bunch of cloud AV keeps popping up and i need to restart my computer new! how do i go to do that?
 
Put your windows disk in and restart your pc.

Follow onscreen prompts for factory restore.
 
That's hard to say, you haven't provided any information about your laptop.

Do you have a Recovery CD that came with the laptop or do you have a newer laptop that has a Recovery partition?

Would be nice to know operating system, make and model number of laptop.
 
Do you have a Recovery CD that came with the laptop or do you have a newer laptop that has a Recovery partition?

That's a good point. Recovery partition didn't cross my mind when I suggested using DBAN to wipe & start fresh.
 
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