i have a same problem, its not installed antivirus, firewall norhing sence upgrade the program i have the problem :S
in the logg file appears this:
"Error occured- latest:ERROR_LOCAL_IO
00100000001001000000000000000001 <Statuscode
00000000001000000000000000000000 |ERROR_LOCAL_IO
00000000000001000000000000000000 |PLUGIN_IN_PROGRESS
00100000000000000000000000000000 |PLUGIN_ACTIVE
00000000000000000000000000000001 |TODO
00000000000000000000000000000001 |VALUE_ID_PREMIUM_DISABLE"