Haha, you don't know what you're talking about.
There is only one trojan for Mac OSX. You need to install a piece of Warez to get it. There are no worms and viruses for OSX. Windows has those ON TOP OF 1000s of trojans.
Secondly, there is tons of junkware for Windows. Most of it is called Shareware, you can buy 100s of programs for between $9.99 and $30 odd to do things such as do screen captures, registry fixes, compose basic music, draw pretty pictures etc. Most of these apps, I speak from experience, are junk.
OSX has a ton of productivity apps for it. These are very solid, usually less expensive than Windows version apps. You also get lots of OSS software for OSX and even some shareware (most of it junk) but not as much.