How to remove recovery/default email addresss

Hotmail can be bruteforced. And CAPTCHA is always being improved because it's always being broken. Also, sometimes companies have vulnerabilities they don't know about or don't acknowledge, etc. Basically what I'm trying to say is, even if you are very safe on the internet (as it sounds you are), your account can still be hacked.

One thing, however, many people over look is when and where they log into their accounts. It is best not to log into email and Facebook in places like the Apple store, on a Starbucks or McDonalds network, etc, as those computers and networks are "out in the open". As we saw with Sony recently, sometimes the big company won't even encrypt sensitive data before it starts sending it through the air. NEVER log into bank accounts from a public network.

Your account can also be compromised by someone cracking the password reset questions you set. Someone can use the forgotten password link to view these questions. If they are easy to guess or ones with common answers you are leaving your account wide open.

Notify your friends that you have been hacked, using Bcc. Notify Hotmail support. And probably, you will have to make a new account.

Whilst it is possible to unlink other computers through the web interface, as slhck noted, this leaves all of your files where you don't want them. Depending on the sensitivity of your files (and how much work you want for yourself) you can:

1. Back up all Dropbox files locally
2. Delete any sensitive files from your Dropbox
3. Wait for the sync to remove these files from the remote computer
4. Unlink the offending computer(s) from https://www.dropbox.com/account#security
5. Return the backed-up files to your Dropbox for re-syncing

It might be worth leaving any other synced computers off (or disabling their syncs) during this process to avoid the sync deleting/restoring where unnecessary.