advapi32/tests: Skip test when registry virtualization can't delete values.

dlls/advapi32/tests/crypt.c

@@ -961,7 +961,13 @@ static void test_machine_guid(void)
    {
        restoreGuid = TRUE;
        r = RegDeleteValueA(key, "MachineGuid");
-       ok(!r, "RegDeleteValueA failed: %d\n", r);
+       ok(!r || broken(r == ERROR_ACCESS_DENIED) /*win8*/, "RegDeleteValueA failed: %d\n", r);
+       if (r == ERROR_ACCESS_DENIED)
+       {
+           skip("broken virtualization on HKLM\\Software\\Microsoft\\Cryptography\n");
+           RegCloseKey(key);
+           return;
+       }
    }
    else
        ok(r == ERROR_FILE_NOT_FOUND, "expected ERROR_FILE_NOT_FOUND, got %d\n",