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The ForegroundFlashCount DWORD in Registry Editor specifies the number of times the taskbar button flashes to notify the user that the system has activated a background window for an app.

By default, the taskbar button will flash orange 7 times quickly, then 3 last slow flashes.

If you like, you can change how many times the taskbar button flashes quickly before the 3 last slow flashes.

This tutorial will show you how to change how many times the taskbar button flashes orange for your account in Windows 7, Windows 8, and Windows 10.
Tip   Tip
As an example, you can test the taskbar button flash count by running the downloaded .exe or .msi file for 7-Zip, then quickly clicking back on your web browser window before the 7-Zip setup opens.

EXAMPLE: Taskbar button flashing
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Here's How:

1. Press the Win+R keys to open Run, type regedit into Run, and click/tap on OK to open Registry Editor.

2. Navigate to the key below in the left pane of Registry Editor. (see screenshot below)

HKEY_CURRENT_USER\Control Panel\Desktop

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3. In the right pane of the Desktop key, double click/tap on the ForegroundFlashCount DWORD to modify it. (see screenshot above)

4. Select (dot) Decimal, type a number for how many times you want the taskbar button to flash quickly before the 3 last slow flashes, and click/tap on OK.
Note   Note
7 is the default value.

Typing 0 will give you indefinite flashes.
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5. Close Registry Editor.

6. Restart the computer to apply.

That's it,