diff --git a/README.md b/README.md
index a78182a..e415642 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,12 @@ anyproxy
 ==========
 A fully configurable proxy in NodeJS, which can handle HTTPS requests perfectly.
 
-(Chinese in this doc is nothing but translation of some key points. Be relax if you dont understand.)
+[wiki - 代理服务器的新轮子](https://github.com/alibaba/anyproxy/wiki/%E4%BB%A3%E7%90%86%E6%9C%8D%E5%8A%A1%E5%99%A8%E7%9A%84%E6%96%B0%E8%BD%AE%E5%AD%90%EF%BC%9Aanyproxy) ，介绍我们为什么要再造一个代理服务器，anyproxy与众不同的结构与功能。
 
 ![](https://i.alipayobjects.com/i/ecmng/png/201409/3NKRCRk2Uf.png_250x.png)
 
+(Chinese in this doc is nothing but translation of some key points. Be relax if you dont understand.)
+
 Feature
 ------------
 * work as http or https proxy
@@ -22,7 +24,8 @@ Usage
 ### step 1 - install
 
 * install [NodeJS](http://nodejs.org/)
-* ``tnpm install -g anyproxy`` , may require ``sudo``
+* ``npm install -g anyproxy`` , may require ``sudo``
+* python is optional, it will be OK if you get some error about it during installing.
 
 ### step 2 - start server
 
@@ -209,6 +212,7 @@ Using https features
 * root certs and temperary certs are stored at ``path.join(util.getUserHome(),"/.anyproxy_certs/")``
 * to get the rootCA.crt file , you may either find it in local dir or download it via anyproxy web interface
 * to clear all the temperary certificates ``anyproxy --clear``
+* https features may be unstable in windows
 
 Others
 -----------------
diff --git a/lib/certMgr.js b/lib/certMgr.js
index 1c2b159..c115be3 100644
--- a/lib/certMgr.js
+++ b/lib/certMgr.js
@@ -14,12 +14,17 @@ var certDir      = path.join(util.getUserHome(),"/.anyproxy_certs/"),
     cmd_genCert  = path.join(cmdDir,"./gen-cer"),
     asyncTaskMgr = new asyncTask();
 
-
 if(!fs.existsSync(certDir)){
-    fs.mkdirSync(certDir,0777);
+    try{
+        fs.mkdirSync(certDir,0777); //may fail in windows
+    }catch(e){
+        console.log("===========");
+        console.log("failed to create cert dir ,please create one by yourself - " + certDir);
+        console.log("this error will not block main thread unless you use https-related features in anyproxy");
+        console.log("===========");
+    }
 }
 
-
 function getCertificate(hostname,cb){
     var keyFile = path.join(certDir , "__hostname.key".replace(/__hostname/,hostname) ),
         crtFile = path.join(certDir , "__hostname.crt".replace(/__hostname/,hostname) );
diff --git a/package.json b/package.json
index 3b5896d..0c817c5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "anyproxy",
-  "version": "2.8.7",
+  "version": "2.8.9",
   "description": "A fully configurable proxy in NodeJS, which can handle HTTPS requests perfectly.",
   "main": "proxy.js",
   "bin": {
diff --git a/proxy.js b/proxy.js
index 73a6f95..0e42d7a 100644
--- a/proxy.js
+++ b/proxy.js
@@ -56,8 +56,8 @@ if(!fs.existsSync(anyproxyHome)){
 if(fs.existsSync(path.join(anyproxyHome,"rule_default.js"))){
     default_rule = require(path.join(anyproxyHome,"rule_default"));
 }
-if(fs.existsSync(process.cwd() + '/rule.js')){
-    default_rule = require(process.cwd() + '/rule');
+if(fs.existsSync(path.join(process.cwd(),'rule.js'))){
+    default_rule = require(path.join(process.cwd(),'rule'));
 }
 
 //option