感謝新浪博主：http://blog.sina.com.cn/s/blog_ee307b6e0101h7lu.html

360軟體管家提示把WinPcap更新至版本：4.1.0.2980，於是把舊版下載後，可新版本怎麼也無法順利安裝，出現以下資訊，舊版本已安裝，關閉所有winpcap-based應用程式和再次執行安裝程式，明明已沒有相應程式可運行了呀,怎麼回事呢？

a previous version of winpcap has been detected on this system and cannot be removed because in use by another application. please close all the winpcap-based applications and run the installer again.

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百度搜索後採用很多建議都沒成功，在國外網站看到如下資訊：

http://translate.google.co.jp/translate?hl=ja&sl=en&tl=ja&u=http://nicolask.wordpress.com/2012/09/23/solved-winpcap-4-12-install-error/&anno=2

打不開國外連結的話，可參考如下：

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[Solved] – WinPCap 4.12 install error

If you see this error, “A previous version of WinPcap has been detected on this system and cannot be removed because in use by another application.Please close all the WinPcap-based applications and run the installer again.”

Try rename these 2 files and re-run the installation again,

C:\Windows\SysWOW64>ren wpcap.dll wpcap.dll.old

C:\Windows\SysWOW64>ren packet.dll packet.dll.old

4.0.0.1040 shp 88,704 11-07-2007 packet.dll.old

4.0.0.1040 shp 240,248 11-07-2007 wpcap.dll.old

After successful installation,

4.1.0.2001 shp 96,784 – 06-26-2010 packet.dll

4.1.0.2001 shp 281,104 06-26-2010 wpcap.dll

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找到相應檔案，並把副檔名修改即可：

●　C:\Windows\SysWOW64 的wpcap.dll改成 wpcap.dll.old

●  C:\Windows\SysWOW64的packet.dll改成 packet.dll.old

其實參照如上做法就可以順利的把 WinPcap4.13 安裝成功喲，試一下吧！