No idea on the Garmin.
I had the Task manager issue a week or so back (also on 64bit W7). Can't remember what I did to correct it though. Maybe I pressed the Alt key. (The reason I'd have done this is that the Alt hides and displays menu bars in some programmes e.g. iTunes). It was something very simple like that which cured it. Never seen it before or again so maybe it's related to an update.
EDIT: Double click somewhere in the inner border, that fixes it.
Last edited by: smokie on Thu 12 Mar 15 at 16:41
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