I tried to activate the Status Bar in my Windows Explorer. I went to View-toolbars and found that where the word "status bar" should loacte was empty. I checked it anyway and found the the tick is there. The word "staus bar" still did not appear and nothing happened to the bottom of my screen. Any clue?

You could have been infected with adware, spyware, virus, etc. Run an AV scan, and download AdAware, Spybot, and CWShredder, install them, update them, and run. Delete anything that looks suspicious. Some advise deleting everything because it's all reversible. Also get SpyWare Blaster which keeps a list of bad stuff on your computer and blocks them from being in-stalled (theoretically). AdAware Spybot CWShredder SpywareBl Delete all your cookies and temp internet files. Finally, sfc /scannow might restore something that was accidentally deleted.