Hi, I've used bitdefender for a while now.
and I've always had performance issues with it. I've send several emails to the support regarding issues but that didn't accomplish a lot.
now, the problem I'm having is, is that when I have bitdefender (internet security 2013 latest updates) installed, my computer boot takes significantly longer then it would take normally. because when the windows 8 boot logo dissapears my screen stays blank for like 20 seconds before I can actually log on.
besides that, the bdagent service seems to take up a lot of harddisk usage (not space). also, when bitdefender is updating (which it does a lot) my internet is just sooo slow. and I'm pretty sure it has nothing to do with anything else than bitdefender as I have 100mb/s internet up/down speed.
besides that, the overal responsiveness of my system is just slower. and when i uninstall bitdefender everything works perfectly fine again.
and last but not least, the interface seems buggy. when i disable auto update it just re-enables itself after a few minutes. and I can not keep auto pilot turned off as i like to keep control of things myself. (when i disable it, it's just enabled again after some time)
Am I the only one suffering from this performance impact? and can this be solved?
help is appreciated 
some info about my pc:
-Sony Vaio
-Intel Core I5 @3,1Ghz
-6Gb ddr3 ram
-Windows 8.1 Proffesional
-100mb/s down/up internet glass fibre cable
-Bitdefender internet security 2013 fully updated
-AMD Radeon Graphics