Press ~ to open Console.
Use the following to level up any skill to 100.
player.advskill alchemy 999999
player.advskill alteration 999999
player.advskill marksman 999999
player.advskill block 999999
player.advskill conjuration 999999
player.advskill destruction 999999
player.advskill heavyarmor 999999
player.advskill illusion 999999
player.advskill lightarmor 999999
player.advskill lockpicking 999999
player.advskill onehanded 999999
player.advskill pickpocket 999999
player.advskill restoration 999999
player.advskill sneak 999999
player.advskill speechcraft 999999
player.advskill twohanded 999999
player.advskill smithing 999999
player.advskill enchanting 999999
Go into Skills and Level Up. All skills leveled to 100 should level you up to around 81.