Bitdefender Installer Does Not Work On Asus Computer

I have avast premier installed on my Asus laptop (windows 8.1, 64 bit, core i5, 8GB).

This is what I do to install Bitdefender (but did not work)

1. I have removed avast premier using avastclear.exe in safe mode and restarted the computer

2. start bitdefender_tsecurity.exe

3. A pop-up window appears with the message: "Welcom to Bitdefender. Before continuing, we need to remove any other antivirus solutions." I clicked continue, and nothing happenned.

Important points:

1. I have no other antivirus solution on my computer.

2. I could install Bitdefender total security on my other computer running windows 8.1 and with avast premier removed as above. That computer is not ASUS.

Anybody has any suggestion? I have been trying the whole day and still can't figure out why it did not work. The installer issue no message; it just did nothing.

I've had the same experience. ALL products were removed and I tried to use the Bitdefender diagnostic tool which threw error on mfc100u.dll then shutdown. I had to go back and re-install McAfee after trying to install Bitdefender for 4 hours using the offline install process and everything I could think of. There is a serious problem here. Also installed on another different system without issue.

Went through all the support steps to no avail then decided to search system for name of security product (McAfee). Found several file (vaults MOB file, etc.. ) Not all would delete, so I checked services and found that two were still running , so I disabled them. Still unable to delete even after reboot, so I went through registry and manually deleted them (Warning: Experienced users only - I have over 30 years IT experience). Rebooted then was able to delete remaining files. Ran CCLeaner to clear up old pointers.

Was able to complete the install using offline install file.