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After running Win 7 for some unknown period of time, the taskbar icon highlight starts to stick (video demo here: http://screencast.com/t/l5LhJ2uM). If I restart or kill explorer.exe and relaunch, it goes away.

Any idea what might be causing this?

John Sheehan
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    Alright, so clearly Microsoft never got around to fixing this in Windows 7... Anyone know if it's fixed in Win8? I haven't installed it yet. – Ricket Oct 09 '12 at 04:03
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    I have Windows 8.1 and this issue still isn't resolved. It's incredibly annoying. – Kale Muscarella Oct 10 '13 at 19:20
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    Aha! So it's not just on my machine! Sometimes I wonder if Windows was ever designed to be powered on for more than short periods of time. – Camilo Martin Nov 17 '13 at 12:01
  • I don’t recall it ever happening before, but now it seems to be happening all the time. It happens every few seconds and/or window operations and the current batch of fixes (rebooting, right-clicking, etc.) are all just temporary and it reappears moments later. In addition to the highlight, the tooltip also gets stuck, and the buttons all behave incorrectly (as though the mouse/keyboard are stuck). Why the hell has Microsoft not fixed this damned annoying problem after all this time‽‽‽ – Synetech Feb 25 '14 at 04:34
  • For me it behaves like this: If it got stuck and you solve it by shift+right clicking, it quickly gets stuck again. If I restart explorer, it takes some more time again to get it stuck, but still faster than rebooting my whole PC. Looks like some monkeys programmed that. – Ray Apr 22 '14 at 09:29
  • 2009 + 5 this is STILL happening. – madprops Sep 19 '14 at 16:58
  • 2009 + 7 says hi. – riv Jan 31 '16 at 12:38
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  • Windows 10, and it's still happening!
  • – FoxInFlame Jun 06 '16 at 14:39
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    It doesn't seem to be directly related to system uptime or session age. I recently had a 100+ day session on my Windows 7 (no logouts, standbys, hibernations etc.) and this bug never appeared. I rebooted my system today, and started encountering the problem after just a few hours. – Daniel Saner Dec 07 '16 at 22:13