diff --git a/upgrade.php b/upgrade.php
index 0375c18f2..653214b0d 100644
--- a/upgrade.php
+++ b/upgrade.php
@@ -1,11 +1,15 @@
 <?php
 (PHP_SAPI !== 'cli' || isset($_SERVER['HTTP_USER_AGENT'])) && die('Access denied.');
 
-$pwu_data = posix_getpwuid(posix_geteuid());
-$username = $pwu_data['name'];
+if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
+	echo "Skipping user check as it is not supported on Windows\n";
+} else {
+	$pwu_data = posix_getpwuid(posix_geteuid());
+	$username = $pwu_data['name'];
 
-if (($username=='root') || ($username=='admin')) {
-    die("\nERROR: This script should not be run as root/admin. Exiting.\n\n");
+	if (($username=='root') || ($username=='admin')) {
+		die("\nERROR: This script should not be run as root/admin. Exiting.\n\n");
+	}
 }