diff --git a/handbook/troggle/troglaptop.html b/handbook/troggle/troglaptop.html
index 3c1e9dfb6..f4a71c371 100644
--- a/handbook/troggle/troglaptop.html
+++ b/handbook/troggle/troglaptop.html
@@ -55,6 +55,7 @@ Windows Subsystem for Linux now packaged as a Microsoft Store app</a> so WSL doc
         <li>Install <a href="https://linuxconfig.org/ubuntu-22-04-on-wsl-windows-subsystem-for-linux">Ubuntu 22.04 LTS</a> - must be done using <a href="https://support.microsoft.com/en-us/account-billing/how-to-open-microsoft-store-on-windows-e080b85a-7c9e-46a7-8d8b-3e9a42e32de6">MS App Store</a>.
       </ul>
 </ul>
+<p>Before you do anything else, get yourself set up with a <a href="../computing/keyexchange.html">key-pair</a> to access the software on the expo server properly.
 <p>There are two scripts in the <var>troggle</var> folder which will do semi-automatically what is described below. Have a look at
   <ul>
     <li><var>os-trog.sh</var>