user18337: My computer just got formatted, and so did my wallet. I had imported the private keys from my wallet a week back. Can I just load that again into multibit, and get my bitcoins back?
I have also had several transactions after I imported it

user15412: Yes, you can. The private keys unlock your wallet, which will be synchronised to the network. You then have access to the wallet, with the bitcoins before and after the back-up of the private keys, just the balance blockchain.info says you have. So no need to have an recent back-up of those keys.

18337: <p>My computer just got formatted, and so did my wallet. I had imported the private keys from my wallet a week back. Can I just load that again into multibit, and get my bitcoins back?</p>

<p>I have also had several transactions after I imported it</p>
 15412: <p>Yes, you can. The private keys unlock your wallet, which will be synchronised to the network. You then have access to the wallet, <strong>with</strong> the bitcoins before and after the back-up of the private keys, just the balance <a href="http://blockchain.info" rel="nofollow">blockchain.info</a> says you have. So no need to have an recent back-up of those keys.</p>
