Actually my problem is I am not able to listen online songs,I am not able to download,so one of my friend suggested to boot the system can any one tell me how to do this

Well to "boot" is the act of turning it on, so that's a simle case of pressing the power button.

Can you give us an example of online songs that you cannot listen to?

Online songs in the sense from raaga.. and other sites

I can play the songs on Firefox. Since it's a streaming site you won't be able to save them. What happens on your end when you try to play songs? I tried this link: RAAGA - Mystic Soundscapes Forest - World Music Movie Songs

By the way Firefox blocks a lot of popups from that site but Internet Explorer doesn't and it's quite annoying.