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.app
百度搜索後採用不少建議都沒成功，在國外網站看到以下信息：wordpress
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網站
打不開國外連接的話，可參考以下：this
[Solved] – WinPCap 4.12 install errororm
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.」blog
Try rename these 2 files and re-run the installation again,rem
C:\Windows\SysWOW64>ren wpcap.dll wpcap.dll.oldit
C:\Windows\SysWOW64>ren packet.dll packet.dll.oldio
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
-----------------------------------------------------------------------------
找到相應文件，並把擴展名修改便可：
● C:\Windows\SysWOW64 的wpcap.dll改爲 wpcap.dll.old
● C:\Windows\SysWOW64的packet.dll改爲 packet.dll.old
其實參照如上作法就能夠順利的把 WinPcap4.13 安裝成功喲，試一下吧！