Hi,
I'm running Bitdefender 2013 total security and had a problem with Logon to the Lloyds banking site. I have read many forums with people who had a similar problem, and yes it is partly to do with the new version of Bitdefender but not totally.
After uninstalling it many times and checking i could log in successfully to my on-line bank without Bitdefender, i finally re-installed Bitdefender 2013 and tried something different.
Most people running Windows 7 will have 2 types of internet explorer browser, 32 bit and 64 bit. I opened the 64 bit browser on my laptop and then managed to logon to Lloyds internet banking straight away, no problems.
If you are like me you probably only use your 32 bit version because many websites still don't support the 64 bit one. It's easy to forget!! i did.
Anyway i really hope this helps at least one person from the same pain and hassle i went through?
good luck !!
Johnny B 