Need to turn off comments

I am getting too many spam comments on my new Drupal primer website. I need to turn off comments until I can find a way to deal with spammers.

I think most of the spam comments are posted by XRumer. This is a nasty piece of software able to bypass security techniques commonly used by websites to prevent automated spam, such as account registration, client detection, many forms of CAPTCHAs, and e-mail activation. It registers an account automatically. The program utilises SOCKS and HTTP proxies to make it more difficult for administrators to block posts by source IP.  It also features a proxy checking tool to verify the integrity and anonymity of the proxies used.