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 .

免费的杀毒软件，如avast和avgfree（面向windows系统），以及iantivirus（面向mac系统）也能实施最基本病毒防护和检查安全问题。