Standard Windu? Before getting Vaapad amp against Sidious?
Force: Dooku 6-7/10 - He can draw knowledge from both sides of the force and knows more tricks. Still a tough fight for the count.
Sabers: Windu 5-6/10 - Both have the same speed and endurance. It's still too close to really call but I'll give it to Windu with a form advantage. Dooku can't generate powerstrikes against Windu, and his juyo is too flawless to find many openings. If Windu gets sloppy though, Dooku will win.
All-Out: Honestly don't know. If their force abilities cancel each other out, I'll give it to Windu for the same reason as sabers.