diff --git a/core/src/main/java/io/kestra/core/storages/InternalNamespace.java b/core/src/main/java/io/kestra/core/storages/InternalNamespace.java
index 7ff43f9338b..9b1921027fa 100644
--- a/core/src/main/java/io/kestra/core/storages/InternalNamespace.java
+++ b/core/src/main/java/io/kestra/core/storages/InternalNamespace.java
@@ -201,6 +201,6 @@ public URI createDirectory(Path path) throws IOException {
      **/
     @Override
     public boolean delete(Path path) throws IOException {
-        return storage.delete(tenant, NamespaceFile.of(namespace, path).storagePath().toUri());
+        return storage.delete(tenant, URI.create(path.toString().replace("\\","/")));
     }
 }
diff --git a/core/src/main/java/io/kestra/core/utils/WindowsUtils.java b/core/src/main/java/io/kestra/core/utils/WindowsUtils.java
index a2cd03f1107..45b9ca4deec 100644
--- a/core/src/main/java/io/kestra/core/utils/WindowsUtils.java
+++ b/core/src/main/java/io/kestra/core/utils/WindowsUtils.java
@@ -5,20 +5,26 @@
 
 public class WindowsUtils {
 
-    public static String windowsToUnixPath(String path){
+    public static String windowsToUnixPath(String path, boolean startWithSlash) {
         Matcher matcher = java.util.regex.Pattern.compile("([A-Za-z]:)").matcher(path);
         String unixPath = matcher.replaceAll(m -> m.group().toLowerCase());
 
         unixPath = unixPath
             .replace("\\", "/")
             .replace(":", "");
-        if (!unixPath.startsWith("/")) {
+        if (!unixPath.startsWith("/") && startWithSlash) {
             unixPath = "/" + unixPath;
         }
         return unixPath;
     }
 
+    public static String windowsToUnixPath(String path) {
+        return windowsToUnixPath(path, true);
+    }
+
     public static URI windowsToUnixURI(URI uri) {
-        return URI.create(windowsToUnixPath(uri.toString()));
+
+        return URI.create(windowsToUnixPath(uri.toString(), false));
+
     }
 }
diff --git a/core/src/main/java/io/kestra/plugin/core/namespace/DeleteFiles.java b/core/src/main/java/io/kestra/plugin/core/namespace/DeleteFiles.java
index 3f008c5b8e1..1ed79b75596 100644
--- a/core/src/main/java/io/kestra/plugin/core/namespace/DeleteFiles.java
+++ b/core/src/main/java/io/kestra/plugin/core/namespace/DeleteFiles.java
@@ -20,6 +20,7 @@
 import org.slf4j.Logger;
 
 import java.net.URI;
+import java.nio.file.Path;
 import java.util.List;
 import java.util.Map;
 
@@ -103,7 +104,7 @@ public Output run(RunContext runContext) throws Exception {
         long count = matched
             .stream()
             .map(Rethrow.throwFunction(file -> {
-                if (namespace.delete(file)) {
+                if (namespace.delete(NamespaceFile.of(renderedNamespace, Path.of(file.path().replace("\\","/"))).storagePath())) {
                     logger.debug(String.format("Deleted %s", (file.path())));
                     return true;
                 }
diff --git a/webserver/src/main/java/io/kestra/webserver/controllers/api/NamespaceFileController.java b/webserver/src/main/java/io/kestra/webserver/controllers/api/NamespaceFileController.java
index 5cef81ae81f..7784a576e02 100644
--- a/webserver/src/main/java/io/kestra/webserver/controllers/api/NamespaceFileController.java
+++ b/webserver/src/main/java/io/kestra/webserver/controllers/api/NamespaceFileController.java
@@ -6,6 +6,7 @@
 import io.kestra.core.storages.StorageInterface;
 import io.kestra.core.tenant.TenantService;
 import io.kestra.core.utils.Rethrow;
+import io.kestra.core.utils.WindowsUtils;
 import io.micronaut.core.annotation.Nullable;
 import io.micronaut.http.HttpResponse;
 import io.micronaut.http.MediaType;