How to Enable Set Default Tab Feature for Task Manager in Windows 10

Task Manager can be used to view and manage your processes, performance statistics, app history, users, processes details, and services in Windows 10.

Starting with Windows 10 build 18305, some Windows Insiders, as a part of A/B testing, can now set a preferred tab to have Task Manager open to by default.

If you were included in this A/B testing, then you are already good to go to use the set default tab feature in Task Manager.

If you were not included in this A/B testing, then you can use Mach2 by Rafael Rivera to enable the "Set default tab" feature in Task Manager.

Mach2 manages the Windows Feature Store, where Features (and associated on/off state) live. This store lives in the undocumented Windows Notification Facililty (WNF), which provides publish-subscribe messaging for kernel components, system services, and user-space applications. Windows currently contains thousands of Feature switches that turn on and off new and unfinished functionality, mitigations, test hooks, and overrides. Mach2 provides facilities to discover these switches and turn them on or off.

This tutorial will show you how to enable the new Set default tab feature in Task Manager for all users in Windows 10.

You must be signed in as an administrator to enable this feature with Mach2.

This will not work on the Windows 10 Enterprise edition.

warning   Warning
It is recommended that you create a restore point or system image before enabling the experimental Set default tab feature in Task Manager.

This way if forcing to enable this feature causes any issues on your system, you will be able to easily undo it.

EXAMPLE: "Set default tab" feature in Task Manager
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Here's How:

1. Close Task Manager if open.

2. Click/tap on the Download button below to go download the 32-bit (x86) or 64-bit (x64) version of Mach2 for your system from its official GitHub page. (see screenshot below)


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3. Save the file to your desktop.

4. Unblock the downloaded file.

5. Right click or press and hold on the file, click/tap on Extract all, and click/tap on Extract. (see screenshots below)

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6. In the extracted mach2_0.3.0.0_x64 folder, click/tap on the Home tab, select the mach2.exe file, and click/tap on Copy path in the Ribbon. (see screenshot below)

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7. Open an elevated command prompt.

8. Press Ctrl+V to paste the full path of the mach2.exe file from step 6 into the elevated command prompt. (see screenshot below step 9)

9. Add a space after the full path, type enable 19349505, and press Enter. (see screenshot below)

For example: "C:\Users\Brink\Desktop\mach2_0.3.0.0_x64\mach2.exe" enable 19349505

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10. Open Task Manager, and click/tap on Options on the menu bar to see the now enabled Set default tab feature.

11. If you like, you can now delete the file and mach2_0.3.0.0_x64 folder on your desktop.

That's it,