How : windows users should download avast free antivirus .
怎么做：windows用户应当下载avast免费杀毒软件。
There is avast difference between failure and temporary defeat .
掉败和权且被打败有极大的区别。
Free anti virus programs such as avast and avg free ( both for windows ) and iantivirus ( for mac ) will also cover most basic virus protection and browser safety issues .
