Just install Ubuntu, it works very well with ThinkPads and it's made to be easy to use for end-users.
For my developers getting new machines, I tell them to split the HD into 3 partitions: Windows, Ubuntu and Mint - give each a one-week shot and then stick with what feels best.
Just install Ubuntu, it works very well with ThinkPads and it's made to be easy to use for end-users.