diff --git a/src/main/ua-parser.js b/src/main/ua-parser.js
index 5d6c8d23..1314d9d9 100755
--- a/src/main/ua-parser.js
+++ b/src/main/ua-parser.js
@@ -318,8 +318,7 @@
             /(?:\buc? ?browser|(?:juc.+)ucweb)[\/ ]?([\w\.]+)/i                 // UCBrowser
             ], [VERSION, [NAME, 'UCBrowser']], [
             /microm.+\bqbcore\/([\w\.]+)/i,                                     // WeChat Desktop for Windows Built-in Browser
-            /\bqbcore\/([\w\.]+).+microm/i
-            ], [VERSION, [NAME, 'WeChat(Win) Desktop']], [
+            /\bqbcore\/([\w\.]+).+microm/i,
             /micromessenger\/([\w\.]+)/i                                        // WeChat
             ], [VERSION, [NAME, 'WeChat']], [
             /konqueror\/([\w\.]+)/i                                             // Konqueror
@@ -757,12 +756,12 @@
             // Windows
             /microsoft (windows) (vista|xp)/i                                   // Windows (iTunes)
             ], [NAME, VERSION], [
-            /(windows) nt 6\.2; (arm)/i,                                        // Windows RT
-            /(windows (?:phone(?: os)?|mobile))[\/ ]?([\d\.\w ]*)/i,            // Windows Phone
-            /(windows)[\/ ]?([ntce\d\. ]+\w)(?!.+xbox)/i
+            /(windows (?:phone(?: os)?|mobile))[\/ ]?([\d\.\w ]*)/i             // Windows Phone
             ], [NAME, [VERSION, strMapper, windowsVersionMap]], [
-            /(win(?=3|9|n)|win 9x )([nt\d\.]+)/i
-            ], [[NAME, WINDOWS], [VERSION, strMapper, windowsVersionMap]], [
+            /windows nt 6\.2; (arm)/i,                                        // Windows RT
+            /windows[\/ ]?([ntce\d\. ]+\w)(?!.+xbox)/i,
+            /(?:win(?=3|9|n)|win 9x )([nt\d\.]+)/i
+            ], [[VERSION, strMapper, windowsVersionMap], [NAME, WINDOWS]], [
 
             // iOS/macOS
             /ip[honead]{2,4}\b(?:.*os ([\w]+) like mac|; opera)/i,              // iOS
diff --git a/test/specs/browser-all.json b/test/specs/browser-all.json
index c4c161db..98e5f6ca 100644
--- a/test/specs/browser-all.json
+++ b/test/specs/browser-all.json
@@ -1743,7 +1743,7 @@
         "ua"      : "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36 MicroMessenger/6.5.2.501 NetType/WIFI WindowsWechat QBCore/3.43.901.400 QQBrowser/9.0.2524.400",
         "expect"  :
         {
-            "name"    : "WeChat(Win) Desktop",
+            "name"    : "WeChat",
             "version" : "3.43.901.400",
             "major"   : "3"
         }
@@ -1753,7 +1753,7 @@
         "ua"      : "mozilla/5.0 (windows nt 10.0; wow64) applewebkit/537.36 (khtml, like gecko) chrome/53.0.2785.116 safari/537.36 qbcore/4.0.1301.400 qqbrowser/9.0.2524.400 mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, like gecko) chrome/81.0.4044.138 safari/537.36 nettype/wifi micromessenger/7.0.20.1781(0x6700143b) windowswechat",
         "expect"  :
         {
-            "name"    : "WeChat(Win) Desktop",
+            "name"    : "WeChat",
             "version" : "4.0.1301.400",
             "major"   : "4"
         }
diff --git a/test/specs/os-all.json b/test/specs/os-all.json
index 5bf7630b..9ad108cb 100644
--- a/test/specs/os-all.json
+++ b/test/specs/os-all.json
@@ -80,6 +80,24 @@
             "version" : "10"
         }
     },
+    {
+        "desc"    : "WeChat Desktop for Windows Built-in Browser",
+        "ua"      : "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36 MicroMessenger/6.5.2.501 NetType/WIFI WindowsWechat QBCore/3.43.901.400 QQBrowser/9.0.2524.400",
+        "expect"  :
+        {
+            "name"    : "Windows",
+            "version" : "7"
+        }
+    },
+    {
+        "desc"    : "WeChat Desktop for Windows Built-in Browser major version in 4",
+        "ua"      : "mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, like gecko) chrome/81.0.4044.138 safari/537.36 nettype/wifi micromessenger/7.0.20.1781(0x6700143b) windowswechat",
+        "expect"  :
+        {
+            "name"    : "Windows",
+            "version" : "7"
+        }
+    },
     {
         "desc"    : "Windows RT",
         "ua"      : "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; ARM; Trident/6.0)",