diff --git a/src/dos/dos_misc.cpp b/src/dos/dos_misc.cpp
index be0b5fdf4..95c957361 100644
--- a/src/dos/dos_misc.cpp
+++ b/src/dos/dos_misc.cpp
@@ -397,6 +397,12 @@ static bool DOS_MultiplexFunctions(void) {
 		return true;
 	case 0x1700:
 		if(control->SecureMode()||!clipboard_dosapi) return false;
+        {// Norton Utilities 8.0 installer checks this before continue
+            char psp_name[9];
+            DOS_MCB psp_mcb(dos.psp()-1);
+            psp_mcb.GetFileName(psp_name);
+            if (!strcmp(psp_name, "INSTALL")) return false;
+        }
 		reg_al = 1;
 		reg_ah = 1;
 		return true;