: Windows XP or Windows 7 (32-bit) are the most stable environments for these clones. Disclaimer : Using clone tools carries a risk of permanent ECU damage. Do you have the specific image file
However, always keep a backup of 2.25. If you tune a rare ECU that fails with 2.70 (some Asian market ECUs have this issue), you can always revert.
Updating a clone is not like updating an original Kess or Ktag. If done incorrectly, you will "brick" the device, turning it into a paperweight. Follow this guide precisely.