system
1
Recently I installed OA on my laptop, it worked fine until I upgraded to Avast! 6.0.1367.
No internet! 
Uninstalled OA and my internet is back! 
More bugs to fix in OA???
DavidR
2
Not necessarily, on a program update the changed program executables will likely be blocked or at least challenged by the firewall.
First I would have checked that avastSvc.exe was allowed (not uninstalled as that doesn’t find the cause) and if so delete the entry and reconnect forcing the firewall to ask again.
system
3
DavidR,
Thanks for replying.
Actually I did what you suggested, last night, it didn’t work.
Check this link: http://support.emsisoft.com/topic/6599-oa51-issues/
I did have 5.1.
Pondus
4