diff --git a/PC/bdist_wininst/install.c b/PC/bdist_wininst/install.c
--- a/PC/bdist_wininst/install.c
+++ b/PC/bdist_wininst/install.c
@@ -2366,23 +2366,27 @@ void DeleteRegistryKey(char *string)
     char *delim;
     HKEY hKey;
     long result;
     char *line;
 
     line = strdup(string); /* so we can change it */
 
     keyname = strchr(line, '[');
-    if (!keyname)
+    if (!keyname) {
+        free(line);
         return;
+    }
     ++keyname;
 
     subkeyname = strchr(keyname, ']');
-    if (!subkeyname)
+    if (!subkeyname) {
+        free(line);
         return;
+    }
     *subkeyname++='\0';
     delim = strchr(subkeyname, '\n');
     if (delim)
         *delim = '\0';
 
     result = RegOpenKeyEx(hkey_root,
                           keyname,
                           0,
@@ -2408,26 +2412,32 @@ void DeleteRegistryValue(char *string)
     HKEY hKey;
     long result;
     char *line;
 
     line = strdup(string); /* so we can change it */
 
 /* Format is 'Reg DB Value: [key]name=value' */
     keyname = strchr(line, '[');
-    if (!keyname)
+    if (!keyname) {
+        free(line);
         return;
+    }
     ++keyname;
     valuename = strchr(keyname, ']');
-    if (!valuename)
+    if (!valuename) {
+        free(line);
         return;
+    }
     *valuename++ = '\0';
     value = strchr(valuename, '=');
-    if (!value)
+    if (!value) {
+        free(line);
         return;
+    }
 
     *value++ = '\0';
 
     result = RegOpenKeyEx(hkey_root,
                           keyname,
                           0,
                           KEY_WRITE,
                           &hKey);