Thankz for ur answer Vlk, but no, i have downloaded the Pro Version of Avast, and i have re-downloaded it, but there is the same problem, im tired of trying to upgrade my avast 4.8 to 5. Is there any other way to type the 4.8 key into 5? Cuz it could be great! Thankz again. I will try to install the 5 pro on top of 4.8 pro, let's see if it suceed now. If not i will tell you. bye.