Ever since I installed Bitdefender 2015, I've seen the first tile of my Start Screen highlighted with a white border around it. I've never had this happen before and I highly suspect that the AV caused it.
The same problem was reported in an AnandTech post:
http://forums.anandtech.com/showthread.php?p=36580191
And that user also stated that he recently installed Bitdefender 2015.
