Here are some options to increase the “logon” speed…I don’t call it boot because it is after you put in PW and wait for desktop to fully load.
Boot to me is POST thru Windows to Logon screen.
I know this is Avast 8 but options are there in new 2014 too: http://www.getavast.net/stop-slow-startup-boot
I’m only guessing that if there “is” internet connection it is the downloading and updating of VPS that makes this slow.
If no internet connection it takes Avast update awhile to try and fail…not sure, just a guess.
Either way, polling & getting a VPS update at “logon” does take time…frankly it does on every A/V product I’ve ever used.