Alternative to PrimoPDF?

I have a 44 page doent that I need to add security settings to. Can't afford Adobe 9. PrimoPDF worked great one time. It's freeware and now I get an error message everytime I try and use it. Uninstalled and reinstalled to no avail. Many free trials only convert a doent up to a certain# of pages, or put a watermark on the doent. I need a good alternative to PrimoPDF that's free.