diff --git a/HELP.md b/HELP.md
index fbada83..e41d757 100644
--- a/HELP.md
+++ b/HELP.md
@@ -14,11 +14,18 @@ button to start your virtual machine again.
 
 ## I want to install additional apps or games
 
-If you are running Windows 10, macOS, or Linux, you can probably "mount" the
+If you are running macOS, or Linux, you can probably "mount" the
 virtual hard drive used by `windows95` to add files. Hit the "Show Disk Image"
 button in the lower right of the app, which will take you to the disk image.
-On both Windows 10 and macOS, double-click the disk image to open it.
+
+On macOS, double-click the disk image to open it.
+
+On Windows 10, Windows will _think_ that it can open up the image, but will
+actually fail to do so. Use a tool [like OSFMount][osfmount] to mount your 
+disk image.
 
 On Linux, search the Internet for instructions on how to mount an `img` disk
-image on your distribution.
+image on your distribution. It's likely that you'll be able to run `mount`
+with the image as input.
 
+[osfmount]: https://www.osforensics.com/tools/mount-disk-images.html