wmic added default windows path (windows)

lib/util.js

@@ -33,6 +33,8 @@ let _cores = 0;
 let wmicPath = '';
 let codepage = '';
 
+const WINDIR = process.env.WINDIR || 'C:\\Windows';
+
 const execOptsWin = {
   windowsHide: true,
   maxBuffer: 1024 * 20000,
@@ -295,7 +297,7 @@ function findObjectByKey(array, key, value) {
 
 function getWmic() {
   if (os.type() === 'Windows_NT' && !wmicPath) {
-    wmicPath = process.env.WINDIR + '\\system32\\wbem\\wmic.exe';
+    wmicPath = WINDIR + '\\system32\\wbem\\wmic.exe';
     if (!fs.existsSync(wmicPath)) {
       try {
         const wmicPathArray = execSync('WHERE WMIC').toString().split('\r\n');
@@ -317,7 +319,7 @@ function wmic(command, options) {
   return new Promise((resolve) => {
     process.nextTick(() => {
       try {
-        exec(process.env.WINDIR + '\\system32\\chcp.com 65001 | ' + getWmic() + ' ' + command, options, function (error, stdout) {
+        exec(WINDIR + '\\system32\\chcp.com 65001 | ' + getWmic() + ' ' + command, options, function (error, stdout) {
           resolve(stdout, error);
         }).stdin.end();
       } catch (e) {