打开cmd执行命令。
d: cd D:\soft\Fiddler2 makecert.exe -r -ss my -n "CN=DO_NOT_TRUST_FiddlerRoot, O=DO_NOT_TRUST, OU=Created by http://www.fiddler2.com" -sky signature -eku 1.3.6.1.5.5.7.3.1 -h 1 -cy authority -a sha1 -m 120 -b 09/05/2012
Fiddler问题 - creation of the root certificate was not successful
原文：http://www.cnblogs.com/kangping/p/6202224.html