Windows 8 to Ubuntu without losing anything?

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http://ubuntuforums.org – I have a problem (no duh, I wouldn't be posting to this forum if I didn't) It would seem that I have grown incredibly disgusted with Windows 8 for my laptop (not this recently. It came with my laptop) and have evaluated Ubuntu as a suitable replacement. However, I have a ton of stuff on my computer that I don't want to lose (data hoarder much, heh). Is there a way to install Ubuntu where I get rid of Windows but keep all of my stuff where I can evaluate what I should keep in a decent-working OS? If specs will help, I have an HP Envy dv7 (let the "mine's bigger" jokes commence) with (Hardware)