Greetings,
I have recently upgraded to Internet Security 2012 and am very disappointed. I am currently running the program on two different computers and am having the same issue - The main module, vsserv.exe, at startup mostly, but also at other times, is working my hard drive to the bone (most of the time at 100% usage). For example, this morning, about an hour after booting my desktop computer (Intel i7 processor, Windows 7, 8 gigs of RAM), I took a look at the task manager, in particular, the IO Bytes read from the disk drives. vsserv.exe had read somewhere in the neighbourhood of 15 gigs, while the rest of the processes running didn't even total anything near 1 gig. I had not done anything significant on the computer (I checked my email once and looked at two websites) - it was idle most of the time. It took vsserv.exe nearly two hours to "settle down" and leave the hard drive alone. During this time, the processor usage wasn't that significant, but when the hard drive is that busy, it severely impacts other processes and programs running thay may require hard drive access (which would likely be most of them). The drive thrashing would stop or at least slow down to a normal level that you would see with Windows when I would turn the antivirus scan off and would immediately go back to working hard when it was turned on.
I also have a problem when transferring files from one computer to the other (mainly from my desktop to my notebook). I connect from the notebook to the desktop via a mapped drive. The data transfer rate is extremely slow between the computers, but if I turn the firewall off on the desktop computer (leaving the notebook's setting unchanged), the transfers absolutely fly. Tech support recommended adding the ip address of the notebook to the desktop, which I did - same result.
I previously had BitDefender 2011 installed and had the same problem, but not to the level that I am experiencing with 2012.
I have followed their tech supports recommendations to perform a repair and I've even uninstalled it completely and re-installed from scratch. While BD was uninstalled, my systems flew, but things returned back to the problematic level when re-installed. I am not running any other security products at all. BitDefender has been all that this computer has seen.
This is getting frustrating.