diff --git a/plugins/woocommerce/changelog/pr-51456 b/plugins/woocommerce/changelog/pr-51456
new file mode 100644
index 00000000000..9d71edd5fbf
--- /dev/null
+++ b/plugins/woocommerce/changelog/pr-51456
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Fix invalid path error in product importer in Windows
diff --git a/plugins/woocommerce/includes/admin/importers/class-wc-product-csv-importer-controller.php b/plugins/woocommerce/includes/admin/importers/class-wc-product-csv-importer-controller.php
index cadf53a7bc5..0ce9d749a2b 100644
--- a/plugins/woocommerce/includes/admin/importers/class-wc-product-csv-importer-controller.php
+++ b/plugins/woocommerce/includes/admin/importers/class-wc-product-csv-importer-controller.php
@@ -125,6 +125,7 @@ class WC_Product_CSV_Importer_Controller {
 
 		// Check that file is within an allowed location.
 		if ( $is_valid_file ) {
+			$normalized_path   = wp_normalize_path( $path );
 			$in_valid_location = false;
 			$valid_locations   = array();
 			$valid_locations[] = ABSPATH;
@@ -135,7 +136,8 @@ class WC_Product_CSV_Importer_Controller {
 			}
 
 			foreach ( $valid_locations as $valid_location ) {
-				if ( 0 === stripos( $path, trailingslashit( realpath( $valid_location ) ) ) ) {
+				$normalized_location = wp_normalize_path( realpath( $valid_location ) );
+				if ( 0 === stripos( $normalized_path, trailingslashit( $normalized_location ) ) ) {
 					$in_valid_location = true;
 					break;
 				}