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I have Windows 7 and Ubuntu in my PC. My Ubuntu is not having speed as I didn't install it correctly. So I would like to clean my PC completely and add Ubuntu alone (without Windows). How should I proceed?

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marked as duplicate by guntbert, Eliah Kagan, blade19899, Eric Carvalho, karel Jan 20 at 2:13

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1 Answer 1

Boot the Ubuntu installer, and choose "Use entire disk".

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