diff --git a/Rapr/Utils/DismUtil.cs b/Rapr/Utils/DismUtil.cs
index accb58b..0edb92b 100644
--- a/Rapr/Utils/DismUtil.cs
+++ b/Rapr/Utils/DismUtil.cs
@@ -41,6 +41,13 @@ public DismUtil(string imagePath)
             {
                 return false;
             }
+            catch (BadImageFormatException ex)
+            {
+                // A DismApi.dll for the other architecture was found on the search path. This mostly
+                // happens on Windows 7, which has no DismApi.dll in System32. Treat DISM as unavailable.
+                Trace.TraceWarning($"DismApi.dll could not be loaded: {ex.Message}");
+                return false;
+            }
 
             return true;
         })();
@@ -67,6 +74,12 @@ public DismUtil(string imagePath)
             {
                 return false;
             }
+            catch (BadImageFormatException ex)
+            {
+                // Same as in IsDismAvailable.
+                Trace.TraceWarning($"DismApi.dll could not be loaded: {ex.Message}");
+                return false;
+            }
 
             return true;
         })();