Ok, thank you, but I am on windows 8 for almost 4 months, I know how to use it and how switcher works, The issue is that this WHITE COUNTOUR never shows up before, until today, I thought it was just me that never notice it, but I don't know... >_<
Yes, that's normal as well. It allows you to click on the white contour to switch to that app without opening App Switcher. It's also a quick way to let you know how many apps are opened without opening App Switcher.
Asus M2N-MX SE Plus § DualCore AMD Athlon 64 X2, 2300 MHz (11.5 x 200) 4400+ § Corsair Value Select
CPU
AMD 4400+/4200+
Motherboard
Asus M2N-MX SE Plus/Asus A8M2N-LA (NodusM)
Memory
2 GB/3GB
Graphics Card(s)
GeForce 8400 GS/GeForce 210
Sound Card
nVIDIA GT218 - High Definition Audio Controller
Monitor(s) Displays
Hitachi 40" LCD HDTV
Screen Resolution
"1842 x 1036"
Hard Drives
WDC WD50 00AAKS-007AA SCSI Disk Device
ST1000DL 002-9TT153 SCSI Disk Device
WDC WD3200AAJB-00J3A0 ATA Device
WDC WD32 WD-WCAPZ2942630 USB Device
WD My Book 1140 USB Device
PSU
Works 550w
Case
MSI "M-Box"
Cooling
Water Cooled
Keyboard
Dell Keyboard
Mouse
Microsoft Intellimouse
Internet Speed
Cable Medium Speed
Browser
Chrome/IE 10
Antivirus
Eset NOD32 6.x/Win Defend
Other Info
Recently lost my Windows 8 on my main PC, had to go back to Windows 7.
Nar, it's part of the app switcher. If you open more than one metro app, then you will see the same when you move the pointer in the upper or lower left corner without fully opening switcher.
Asus M2N-MX SE Plus § DualCore AMD Athlon 64 X2, 2300 MHz (11.5 x 200) 4400+ § Corsair Value Select
CPU
AMD 4400+/4200+
Motherboard
Asus M2N-MX SE Plus/Asus A8M2N-LA (NodusM)
Memory
2 GB/3GB
Graphics Card(s)
GeForce 8400 GS/GeForce 210
Sound Card
nVIDIA GT218 - High Definition Audio Controller
Monitor(s) Displays
Hitachi 40" LCD HDTV
Screen Resolution
"1842 x 1036"
Hard Drives
WDC WD50 00AAKS-007AA SCSI Disk Device
ST1000DL 002-9TT153 SCSI Disk Device
WDC WD3200AAJB-00J3A0 ATA Device
WDC WD32 WD-WCAPZ2942630 USB Device
WD My Book 1140 USB Device
PSU
Works 550w
Case
MSI "M-Box"
Cooling
Water Cooled
Keyboard
Dell Keyboard
Mouse
Microsoft Intellimouse
Internet Speed
Cable Medium Speed
Browser
Chrome/IE 10
Antivirus
Eset NOD32 6.x/Win Defend
Other Info
Recently lost my Windows 8 on my main PC, had to go back to Windows 7.