Sophos SysTray Icon saying Sophos is deactivated when in fact it's not

Hi,

just a minor issue, which is just cosmetic I guess...

On my computer (standalone installation of version 10.3.12.89 which I get from my school who pays for the corporate license), Windows 8.1 Pro, the SysTray Icon often (not always) keeps telling me that Sophos is deactivated (see attached screenshot), when in fact it is not (settings of on-acces scan is "on", Windows Security Center reports that Sophos is active, Sophos itself on entering the "main screen" of the program tells me it's active, and I get the appropriate alerts when accessing files or websites Sophos considers to be malicious).

This only happens on my Windows 8.1 machine (x64), other machines running various kinds of Windows 7 (Home, Pro, Ultimate, both x32 and x64) do not have this issue.

Any clues?

Thanks a bunch for reading my lines. :)