Guinea-Bissau
A long period of political instability has resulted in depressed economic activity, deteriorating social conditions, and increased macroeconomic imbalances. It takes longer on average to register a new business in Guinea-Bissau (233 days or about 33 weeks) than in any other country in the world except Suriname. [The Economist, Pocket World in Figures, 2008 Edition, London: Profile Books]

Q: What is the one country that takes longer than Guinea-Bissau to register a business?
Suriname