有一個非常正的website有琴譜同有得聽

Tinomum

I think these websites should be OK :-

http://www.music-scores.com/
http://www.mysheetmusic.com/
http://www.musicaviva.com/sheet.tpl
http://www.sheetmusicarchive.net/

But anyway, try installing Microsoft anti-spy ware

Tinomum

There is no free lunch.  Free printing is limited.  For nati spysware, I first learnt about this in newspapers, e,g : http://www.thestandard.com.hk/stdn/std/World/GA08Wd07.html
You can download the beta version here :
http://www.microsoft.com/athome/security/spyware/software/default.mspx