Cleanup Update and Secure Media Wiki site

We have a wiki site that has a pretty decent page rank so it has become being spammed by link builders. I need to have someone that knows what they are doing come in and clean up all of the spam posts (about 300) and secure the site so it cannot happen again. Might as well update it to the latest version while you are at it. Current software version is MediaWiki 3.13.3 running on a windows 2008 R2 server. Please place a bid to do this project and send me a PM with a note about similar work or experience you have to do this. This project is urgent so only bid if you can do it within the next 24 hours.