How can I identify a mystery tray icon in Windows 7?

Question

A new icon has appeared in my tray in Windows 7 recently - a black square with a white A in it:

It doesn't have any tooltip or right-click context menu so I haven't been able to identify which process it belongs to. I tried using the "Find Window's Process" tool in Process Explorer but that won't identify individual tray icons.

Short of killing processes until it disappears, is there a good way to identify which process this icon belongs to?

Solution 1

Use Control Panel / Notification Area Icons to identify the icon.

Solution 2

Click the up arrow in the system tray, and select Customize. It'll list all the icons and the programs' names.

Solution 3

This Windows System Tray Scan Utility may work, though it doesn't mention win7 compatibility.

Comments

[Mark]

I wanted to keep the question as general as possible, but if you recognise that specific icon please leave a comment telling me what it is! Thanks.

[Admin]

I believe it is part of your keyboard drivers. Try enabling caps lock, and see if the icon changes...

[Nullpointer42]

Maybe check your startup programs to narrow down what it could be?

[Mark]

Spot on - thanks Francis! If I toggle Caps Lock on then off again it disappears. After that it appears (not always, but a bit haphazardly) when Caps Lock is on. Thank you!

[FiveO]

@Mark: What is the name of your mysery A icon?

[user66001]

@FiveO - superuser.com/questions/505108/… & sevenforums.com/system-security/…

[TheGreatCabbage]

Thanks! For Windows 10 users, go to Settings -> Personalisation -> Taskbar -> "Select which icons appear on the taskbar".