When I hold down the Alt button on my Keyboard for my than 5 seconds, my keyboard and mouse starts acting very strange. For example, when I try typing, none of the typing keys work. Some buttons do strange things, for example, Esc causes windows to minimize. When I click in my code editor (Sublime) it leaves a cursor in every spot I click. Lots of other weird behavior happens.

The only way to get out of this mode is to press Alt again (this time just for a moment is OK)

Has anyone had a similar experience? Is this unique to my computer, my hardware, etc?

Btw, I have a Microsoft Comfort Curve 3000 Keyboard, which I'm very happy with.

  • Are you using any input manipulation utilities i.e. autohotkey/xpadder? – JaredT May 11 '16 at 19:21
  • @jatuttle0 No I am not – CodyBugstein May 11 '16 at 19:22
  • Does this happen with both left and right alt keys? Have you tried a different keyboard? Same keyboard on a different pc? – JaredT May 11 '16 at 19:24
  • @CodyBugstein I have the same keyboard and the exact same problem. I'm on Windows 10. What are you on? And have you found a way to solve it, yet? – The Peaceful Coder Jun 17 '16 at 6:17
  • No I haven't yet – CodyBugstein Jun 17 '16 at 6:43

This may have to do with "USB selective suspend": a quick search shows people who have ctrl/shift/alt keys "sticking" and problems with keyboard repeat who solved that by modifying a registry value associated with their device.

It is a convoluted process to identify the registry key to edit and disable the feature. You first need the vendor, product and instance IDs from the device manager property page of the keyboard:

An example of all three concatenated:


Open regedit.exe, navigate to:


Expand the USB folder and open the folder with the name that matches the VID and PID

Find the folder that matches the Instance ID (in the example, it’s 6&61F43E3&0&2)

Under the Instance ID key, select Device Parameters.

In the details pane, right-click the EnhancedPowerManagementEnabled entry and then click Modify.

Change the Value data to 0 and then click OK

The above is summarized from ( https://blogs.msdn.microsoft.com/usbcoreblog/2013/11/08/help-after-installing-windows-8-1-my-usb-device-doesnt-charge-or-it-disconnects-and-reconnects-frequently/ ) which has pictures and more detail.

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