Zdravim
Jadrom problemu by mohol byt aj fakt, ze Avira uz nepodporuje Win XP. Je mozne, ze niektora z aktualizacii antiviru uz nie je uplne kompatibilna s tymto OS.
http://www.avira.com/en/support-product-lifecycle
Supported operating systems
Microsoft Windows operating systems
Operating system / platform Avira support until (DD.MM.YYYY)
Microsoft Windows XP (Professional Edition, Professional 64 Bit Edition, Home Edition, Tablet PC Edition)
. 08.04.2015
Engine and signatures updates for the products running on Windows XP
. 08.04.2016
Nemusi to byt tym, ale je dost pravdepodobne, ze do buducna bude problemov pribudat. (Moze ist aj o lokalny problem a pomohla by napr.reinstalacia.)
Mozno by stalo za uvahu prejst na iny AV, pripadne zmenit OS.
T.