Bd13 Is Giving A Reset Loop

2-3 weeks ago, I bought Bitdefender 13 because I upgraded to Windows 8 (legal version). I used the installer and had no problems ,except I had to run the installer twice to install it completely.. 2 or 3 days later I got a popup from the program to login with my account and this is where it started. The moment I pressed "register", my pc shut down and resets. I go to the Windows 8 logo and when it wanted to go for the login screen, it restarted again... so on.. so on. I had to use my recovery for windows 8 because I was in a reset loop. After the recovery, I waited 2 days (without problems) before installing it again. But here is the "funny" part. 3 days later, I put on my computer and i'm back in the same reset loop ... again, i had to use my recovery cd to solve it.

Since I didn't had any problems before I bought and installed BD13. I did a test, I didn't installed BD13 since the second recovery and till today I haven't experience any reset loop (1 week 4 days).

So my question is, did anyone else experienced this ? How can I solve it? It would be a shame that I gave €36 for a program that I can't use ...

Sidenote: when I installed BD13 it restarted my computer after the installation. BD13 wasn't proper installed and the second time I ran the installer everything went fine (no restart etc).