diff --git a/packages/bower-config/lib/util/paths.js b/packages/bower-config/lib/util/paths.js
index 92ecd5ff..3b87a036 100644
--- a/packages/bower-config/lib/util/paths.js
+++ b/packages/bower-config/lib/util/paths.js
@@ -11,7 +11,8 @@ var paths = {
 };
 
 // Guess some needed properties based on the user OS
-var temp = os.tmpdir ? os.tmpdir() : os.tmpDir();
+var user = (osenv.user() || 'unkown').replace(/\\/g, '-');
+var temp = path.join(os.tmpdir ? os.tmpdir() : os.tmpDir(), user);
 var home = osenv.home();
 var base;