I purchased the MD802 last year. I finally decided to update it today. After using the update tool, my scan tool no longer works! If I take the memory card out then plug in my scan tool, it just tells me to insert the memory card. I safely removed the memory card from the PC after updating it, and plugged it into my scan tool. I then connected it to the OBD2 port on my car, and the scan tool doesn't boot up at all, the screen stays black. I uninstalled all the updates that I did today, but that didn't work at all.