diff --git a/extra tuts/how to enable OPcache.md b/extra tuts/how to enable OPcache.md
index db21670413..4df0ed4c6f 100644
--- a/extra tuts/how to enable OPcache.md	
+++ b/extra tuts/how to enable OPcache.md	
@@ -1,14 +1,10 @@
-Hier is de handleiding aangevuld met de stappen voor het instellen van de `opcache.file_cache` directive, wat een extra prestatieverbetering biedt.
-
------
-
-Here is a step-by-step tutorial in English on how to enable OPcache.
+I will add a tutorial for setting up OPcache on IIS.
 
 -----
 
 ### Step 1: Install the OPcache PHP Extension
 
-First, you need to install the OPcache module for your specific PHP version. The package name is typically `php-opcache`, but you must specify the exact version.
+First, you need to install the OPcache module for your specific PHP version. The package name is typically `php-opcache`, but it's a virtual package. You must specify the exact version.
 
 1.  **Check your PHP version:**
     `php -v`
@@ -103,4 +99,28 @@ To confirm that OPcache is working, create a PHP info file in your web root.
     Navigate to `http://your_domain.com/info.php`.
 
 3.  **Check the OPcache section:**
-    Search for **"Zend OPcache"**. The "Opcode Caching" status should be **"Up and Running"**. You will also see the configuration settings you just applied, including the path to the file cache.
\ No newline at end of file
+    Search for **"Zend OPcache"**. The "Opcode Caching" status should be **"Up and Running"**. You will also see the configuration settings you just applied, including the path to the file cache.
+
+-----
+
+### OPcache on IIS (Internet Information Services) 🌐
+
+You can also use OPcache on a Windows Server with **IIS**. The configuration is similar to Linux, but with a few key differences.
+
+1.  **Find the `php.ini` file for IIS**:
+    The file is typically located in the PHP installation folder, such as `C:\Program Files\PHP\v8.3\php.ini`.
+
+2.  **Configure `opcache.file_cache`**:
+    In your `php.ini`, set the file cache path using a Windows-style path.
+
+    ```ini
+    opcache.file_cache="C:\inetpub\temp\opcache"
+    ```
+
+    You may also need to set `opcache.mmap_base` on Windows to prevent memory issues with many simultaneous requests.
+
+3.  **Create the cache directory**:
+    Create the folder and ensure the IIS user (e.g., `IIS_IUSRS` or the AppPool user) has write permissions.
+
+4.  **Restart IIS**:
+    Restart IIS to apply the changes. You can do this via the command line with `iisreset` or by using the IIS Manager.
\ No newline at end of file