Well, the bug is with incorrectly disappearing taskbar - taskbar "hides" not in the bottom of the screen, but "taskbar height pixels" higher (see the images in onedrive folder below). It hides in such a way only when you go to start screen with visible taskbar, wait until it disappears and return to desktop in any way (by pressing the win key, by selecting desktop on startscreen or by clicking the windows logo in the lower left corner);  this bug only appears with two monitors setup and heavily depends on monitors position - the secondary monitor lowest point should be below primary monitor lowest point. The bug didn't appear before Update 1; I can't confirm whether it is reproduceable only on my PC at the moment.

This bug is really annoying - when it happens, you need "to cast some magic" - move the mouse to the bottom of the screen, activate/deactivate several applications, etc. in order for taskbar to reappear properly, let alone the fact that it looks unaesthetic.

Will be grateful for any suggestions about how to fix it (without changing monitor positions, of course :).

http://1drv.ms/1ptiBPg - skydrive folder with bug screenshots

P.S. By the way, the forum UI seems to be VERY user-unfriendly :( When I wrote the post and clicked submit, it redirected me to live.com's login page, and then again to the "Ask a question.." page with blank forms. It's great that my browser had cached all the text, so I was able to find it when I clicked back for a couple of times.

• Edited by Sfairat.Od Thursday, October 02, 2014 2:37 PM

Hello, and thank you for your help. No, I didn't use any of them. Here are the infos requested - the first one after clean reboot without external mouse and keyboard and with razer and synaptics apps disabled; I was still able to reproduce the bug in such a conditions using touchpad; the second one with them. http://1drv.ms/1hjO1af

I've just tested it on another machine with windows 8.1 Update 1, and was able to reproduce the bug in exactly the same way - it occurs when secondary monitor lowest point is lower than the primary monitor lowest point.

Hi Sfairat.Od,

I will do more test and see the result.There might be some time delay. Appreciate your patience.

Regards,

I tested and find this bug too. And even more, some times taskbar don't appear after this bug starts and need to restart explorer.exe to fix it.

Hello, here's the screen recording of the bug https://onedrive.live.com/redir?resid=AACD297FC66851BA!8067&authkey=!AGRQoiggR93irhU&ithint=video%2c.avi

This time I was quite lucky, and taskbar reappeared quite easily, but usually it's MUCH MUCH MUCH MORE difficult.

• Edited by Sfairat.Od Sunday, April 27, 2014 11:28 AM

Hi,

What brand of computer did you use?

Please change the resolution down to 2048 x 1152(the host monitor) to check the result.

Regards,

It's resolution already is 2048*1152, of course - it is the native resolution of that display. The brand of laptop is lenovo, but I don't think it matters - I was able to reproduce the bug on macbook pro with 2880*1800 display resolution, with 1920*1080 external display, and on regular PC with two 1920*1080 displays. In all of the cases all the resolutions of displays are set to native.

And even if I use one of my monitors with not-native resolution this bug shouldn't happen, so I couldn't accept your answer as a solution even if it worked.

• Edited by Sfairat.Od Wednesday, May 07, 2014 10:57 AM

Up. More than a month has already passed, and there's still no reply in this topic. I can reproduce this bug for anyone interested via teamviewer.

I have been experiencing this issue since Update 1.  

Same steps I've found to kill explorer and restart it.

Fresh install for the second time.  First one was 8.1 and downloading and applying the update from my MSDN account.  Second one was a fresh ISO with update 1 from MSDN.  Before Update 1, I did not have this issue. 

 

Resolution on 2 23" Acer LED monitors 1920x1080

3 M500 SSD's RAID 0

16GB DDR3 1333

Gigabyte GA-970A-UD3 MB 

AMD Phanom II Quad Core AM3

I've just reproduced the bug in new Windows 10 Technical Preview inside VMWare (which isn't really surprising, because the code should be essentially the same). Here's the screenshot http://1drv.ms/1xFBCWL

• Edited by Sfairat.Od Thursday, October 02, 2014 1:15 PM

This issue seems to be resolved in one of the recent windows 8.1 updates.

• Proposed as answer by Robert Aldwinckle on forumsMVP Thursday, November 13, 2014 10:23 PM
• Marked as answer by Sfairat.Od Friday, November 14, 2014 9:18 AM

This is very interesting as I just recently built a new system with Windows 8.1 Pro and have the same issue.  It is from the secondary monitor (acer 22 inch) being lower than the primary monitor (westinghouse 40 inch LCD), that really stinks!  The 22 inch will always be lower based on the config I have, so the solution is to change the primary monitor to the 22 inch.   That creates more issues then solves, as my eye sight is terrible, the whole reason the family got the 40 inch for me...I have already downloaded the latest updates too.