diff --git a/dlls/msi/msipriv.h b/dlls/msi/msipriv.h
index 206227edf08..ac247ac4548 100644
--- a/dlls/msi/msipriv.h
+++ b/dlls/msi/msipriv.h
@@ -757,7 +757,7 @@ extern MSICONDITION MSI_EvaluateConditionW( MSIPACKAGE *, LPCWSTR );
 extern UINT MSI_GetComponentStateW( MSIPACKAGE *, LPCWSTR, INSTALLSTATE *, INSTALLSTATE * );
 extern UINT MSI_GetFeatureStateW( MSIPACKAGE *, LPCWSTR, INSTALLSTATE *, INSTALLSTATE * );
 extern UINT WINAPI MSI_SetFeatureStateW(MSIPACKAGE*, LPCWSTR, INSTALLSTATE );
-extern LPCWSTR msi_download_file( LPCWSTR szUrl, LPWSTR filename );
+extern UINT msi_download_file( LPCWSTR szUrl, LPWSTR filename );
 extern UINT msi_package_add_info(MSIPACKAGE *, DWORD, DWORD, LPCWSTR, LPWSTR);
 extern UINT msi_package_add_media_disk(MSIPACKAGE *, DWORD, DWORD, DWORD, LPWSTR, LPWSTR);
 extern UINT msi_clone_properties(MSIPACKAGE *);
diff --git a/dlls/msi/package.c b/dlls/msi/package.c
index 574289fb3f1..fa84e9de861 100644
--- a/dlls/msi/package.c
+++ b/dlls/msi/package.c
@@ -833,7 +833,7 @@ MSIPACKAGE *MSI_CreatePackage( MSIDATABASE *db, LPCWSTR base_url )
  *        we should read all the tables to memory, then open the
  *        database to read binary streams on demand.
  */ 
-static LPCWSTR copy_package_to_temp( LPCWSTR szPackage, LPWSTR filename )
+static UINT copy_package_to_temp( LPCWSTR szPackage, LPWSTR filename )
 {
     WCHAR path[MAX_PATH];
 
@@ -842,16 +842,16 @@ static LPCWSTR copy_package_to_temp( LPCWSTR szPackage, LPWSTR filename )
 
     if( !CopyFileW( szPackage, filename, FALSE ) )
     {
+        UINT error = GetLastError();
+        ERR("failed to copy package %s to %s (%u)\n", debugstr_w(szPackage), debugstr_w(filename), error);
         DeleteFileW( filename );
-        ERR("failed to copy package %s\n", debugstr_w(szPackage) );
-        return szPackage;
+        return error;
     }
 
-    TRACE("Opening relocated package %s\n", debugstr_w( filename ));
-    return filename;
+    return ERROR_SUCCESS;
 }
 
-LPCWSTR msi_download_file( LPCWSTR szUrl, LPWSTR filename )
+UINT msi_download_file( LPCWSTR szUrl, LPWSTR filename )
 {
     LPINTERNET_CACHE_ENTRY_INFOW cache_entry;
     DWORD size = 0;
@@ -867,20 +867,24 @@ LPCWSTR msi_download_file( LPCWSTR szUrl, LPWSTR filename )
         cache_entry = HeapAlloc( GetProcessHeap(), 0, size );
         if ( !GetUrlCacheEntryInfoW( szUrl, cache_entry, &size ) )
         {
+            UINT error = GetLastError();
             HeapFree( GetProcessHeap(), 0, cache_entry );
-            return szUrl;
+            return error;
         }
 
         lstrcpyW( filename, cache_entry->lpszLocalFileName );
         HeapFree( GetProcessHeap(), 0, cache_entry );
-        return filename;
+        return ERROR_SUCCESS;
     }
 
     hr = URLDownloadToCacheFileW( NULL, szUrl, filename, MAX_PATH, 0, NULL );
     if ( FAILED(hr) )
-        return szUrl;
+    {
+        WARN("failed to download %s to cache file\n", debugstr_w(szUrl));
+        return ERROR_FUNCTION_FAILED;
+    }
 
-    return filename;
+    return ERROR_SUCCESS;
 }
 
 static UINT msi_get_local_package_name( LPWSTR path )
@@ -925,7 +929,7 @@ UINT MSI_OpenPackageW(LPCWSTR szPackage, MSIPACKAGE **pPackage)
     MSIHANDLE handle;
     LPWSTR ptr, base_url = NULL;
     UINT r;
-    WCHAR temppath[MAX_PATH], localfile[MAX_PATH];
+    WCHAR temppath[MAX_PATH], localfile[MAX_PATH], cachefile[MAX_PATH];
     LPCWSTR file = szPackage;
 
     TRACE("%s %p\n", debugstr_w(szPackage), pPackage);
@@ -952,9 +956,15 @@ UINT MSI_OpenPackageW(LPCWSTR szPackage, MSIPACKAGE **pPackage)
     {
         if ( UrlIsW( szPackage, URLIS_URL ) )
         {
-            file = msi_download_file( szPackage, temppath );
-            if ( file != szPackage )
-                file = copy_package_to_temp( file, temppath );
+            r = msi_download_file( szPackage, cachefile );
+            if ( r != ERROR_SUCCESS )
+                return r;
+
+            r = copy_package_to_temp( cachefile, temppath );
+            if ( r != ERROR_SUCCESS )
+                return r;
+
+            file = temppath;
 
             base_url = strdupW( szPackage );
             if ( !base_url )
@@ -964,7 +974,13 @@ UINT MSI_OpenPackageW(LPCWSTR szPackage, MSIPACKAGE **pPackage)
             if (ptr) *(ptr + 1) = '\0';
         }
         else
-            file = copy_package_to_temp( szPackage, temppath );
+        {
+            r = copy_package_to_temp( szPackage, temppath );
+            if ( r != ERROR_SUCCESS )
+                return r;
+
+            file = temppath;
+        }
 
         r = msi_get_local_package_name( localfile );
         if (r != ERROR_SUCCESS)
@@ -979,6 +995,8 @@ UINT MSI_OpenPackageW(LPCWSTR szPackage, MSIPACKAGE **pPackage)
             return GetLastError();
         }
 
+        TRACE("Opening relocated package %s\n", debugstr_w( file ));
+
         /* transforms that add binary streams require that we open the database
          * read/write, which is safe because we always create a copy that is thrown
          * away when we're done.