Holding ALT+TAB will activate the flip 2D to switch from a window to another. The problem is that this function remains active for a very short time and I'm not able to select the window I want in the foreground. I also noticed that when I put the cursor on an icon on the taskbar, the live preview thumbnail disappears quickly.

I noticed that this problem disappears in 2 situations: 1) with a safe mode restart 2) when I deactivate the charging of the battery from the manufacturer(Dell) software for the battery.

PS I can't remove manually the battery because the laptop is unibody.

Any suggestions for this annoiyng problem?

  • Do you have any keyboard modification programs? Like autohotkey?
    – Keltari
    Jun 9, 2014 at 19:20
  • No. I only have manufacturer system driver and some software like Office, Chrome, Firefox, Spotify ecc...
    – Marco1
    Jun 9, 2014 at 19:34
  • I've seen the same problem on Lenovo laptops, it came and went. I can only assume it is some kind of driver issue because it stopped after some update but I'm not sure which. Jun 9, 2014 at 20:44
  • I don't know Julian. This morning I completely formatted my laptop and with no software and drivers the problem resurfaced again. Maybe it's something related to BIOS?
    – Marco1
    Jun 11, 2014 at 16:29
  • I have a Lenovo T440s with Win8.1U1x64. I found that the problem only happens when it is on power supply. Pull out the cable and Alt-TAB no longer disappears after some seconds. What's more: it seems to be gone for a while after you plug in the power again... strange.
    – cxxl
    Jul 9, 2014 at 20:53


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