... as already mentioned in my other bug report (compact database firefox), the Avira Icon in the Notification Area (right side of/in Taskbar using Windows 7 64-bit) disapears after running CCleaner as of v5.28.
It doesn't disapear right away, but after logoff/logon it is gone.
Even the second User is affected.
The logon to a second User (after running CC on the first user) is immediately missing the avira icon, so that one thinks avira is not running.
Solution: do a second logoff/logon or open Avira i.e. per desktop icon and just close it without further action.
The world will not go under,
but it is 'not quite nice' and very irritating losing the icon in the notification area, since a logoff/logon is not always doable.