I installed antivirus plus 2015 around a month ago but I've had nothing but trouble since. My machine was built it around a year ago and was running flawlessly until the day after I installed the new bitdefender.
The day after I installed 2015 my machine went into an endless loop of automatic repair when I tried to start it up. I did a clean install and i seemed to fix that issue. Installed 2015 again and I've since had issues with the machine powering off moments after starting (repeatedly). The network adapter doesn't work properly on start up, I have to disable and enable it in the device manager to get it to work. Also the machine hangs on power off, has to be turned off at the psu.
I'm not 100% whether it is actually bitdefender or a hardware issue in the mobo or elsewhere in my system but as I said, it was running fine until I installed 2015. I was running antivirus plus 2014 prior with no issues so I was thinking of uninstalling 2015 and going back to 2014 but I can't find a download for that anywhere on the bitdefender site 
Any tips?
Oh and my machine specs:
Gigabyte Z87X-OC
i7 4770k
corsair dominator ram 2*8Gb 1333
gtx 760