Fedora 20 Security or Desktop?
 

I just downloaded Fedora 20 Security for my 32 bit computer. It is a desktop, I chose to to download desktop as I prefer security in built, is this a good idea?

From http://fedoraproject.org/wiki/Security_Spin : The Fedora Security Spin is a livecd based on Fedora to provide a safe test-environment for working on security-auditing, forensics and penetration-testing, coupled with all the Fedora-Security features and tools. What that means, wrt "security in built", is you can for example run OpenVAS (https://fedoraproject.org/wiki/QA:Testcase_OpenVAS), Rootkit Hunter and other tools mentioned here: https://fedoraproject.org/wiki/Category:Security_Lab.

* Remind yourself that "security" is a perpetual process of auditing and adjusting. And while half of secure computing relates to the OS and distribution you use, the other half is in having sane computing habits.

Is the regular installable 32 bit DVD a distro with security hardening?

I'd say Fedora, just like Red Hat Enterprise Linux, CentOS and other derivatives, is a security-conscious distribution and you should perform auditing and hardening just like you would with any other OS or Linux distribution. Also see the distribution security documentation, GNU/Tiger, sectool, openscap, Cisecurity benchmarks, SANS / OWASP top x lists, etc.