QUOTE (Niels @ Dec 1 2007, 08:45 PM)

Dear zhemizi
I recommend that you try this download
microsoft installer cleanup. Install it and start it select the reference to BitDefender Internet Security 2008 press on remove confirm the message. If you downloaded the installer then rightclick on it and choose extract to folder. Now open that folder and double click on setup and see if you can install now.
Best regards
Niels
Dear Niels
Thank you for your suggestions,I installed the "microsoft installer cleanup",but it also can't install,the same with "error code 2755"
I found the Windows Installer service is disabled and can't start servers, so I reinstalled the Windows Installer service, then I reboot the computer and installed the bitdefender and "microsoft installer cleanup" well. The problem was solved already.Sorry to give you so much
trouble,thanks
Best regards
zhemizi