First picture is serious. You have two of the worst antiviruses in history. Two antiviruses makes your pc go slow, so it may cause some " lag " issue so some pictures from other sites you visited few seconds ago appear in places they don't belong. My advice is to reinstall windows and get a proper antivirus, Kaspersky or Avira.
Another thing is that many many people put hundreds of programs & folders on desktop, that makes your pc start/shutdown/load very very slow. Put them in a folder. This is how my desktop looks like and trust me, is fast like hell!
The others pictures are just4fun and troll.