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 Tuning Windows performance

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.. contents::

   :local:

Disable 8.3 name support

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Check status in elevated shell::

  fsutil behavior query disable8dot3

Disable 8.3 names on all volumes::

  fsutil 8dot3name set 1

  fsutil behavior set disable8dot3 1

Corresponding registry leaf (1 - disable, 0 - enable)::

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\NtfsDisable8dot3NameCreation

https://support.microsoft.com/en-us/help/121007/how-to-disable-8-3-file-name-creation-on-ntfs-partitions

  How to disable 8.3 file name creation on NTFS partitions.

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-2000-server/cc959352(v=technet.10)

  About registry key ``NtfsDisable8dot3NameCreation``.

Disable last access time

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Check status in elevated shell::

  fsutil behavior query disableLastAccess

Disable last access time for all NTFS volumes (``1`` - user setting, ``3`` - system setting)::

  fsutil behavior set disableLastAccess 1

  fsutil behavior set disableLastAccess 3

Corresponding registry leaf (1 - disable as user, 3 - disable as system)::

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\NtfsDisableLastAccessUpdate

https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-behavior

  Docs for ``fsutil behavior``.

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-2000-server/cc959914(v=technet.10)

  About registry key ``NtfsDisableLastAccessUpdate``.

Allow symlink evaluation

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Query current setting::

  fsutil behavior query SymlinkEvaluation

Registry keys::

  [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem]

  SymlinkLocalToLocalEvaluation=dword:00000001

  SymlinkLocalToRemoteEvaluation=dword:00000001

  SymlinkRemoteToLocalEvaluation=dword:00000000

  SymlinkRemoteToRemoteEvaluation=dword:00000000

Exclude directories for Windows Defender

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* Open Windows Defender Settings.

* Click "Virus & threat protection".

* Click "Virus & threat protection settings".

* Scroll down to "Exclusions" and click "Add or remove exclusions".

* Click "Add an exclusion" and select "Folder" from the drop-down menu.

* Navigate to the directory to be excluded, or paste its path into the "Folder" text-box, and click

  "Select Folder".

Same from elevated CLI::

  powershell -Command Add-MpPreference -ExclusionPath "C:\tmp"

  powershell -Command Add-MpPreference -ExclusionProcess "java.exe"

  powershell -Command Add-MpPreference -ExclusionExtension ".java"

To show and delete settings::

  powershell -Command "Get-MpPreference | Select -Expand ExclusionPath"

  powershell -Command "Get-MpPreference | Select -Expand ExclusionProcess"

  powershell -Command "Get-MpPreference | Select -Expand ExclusionExtension"

  powershell -Command Remove-MpPreference -ExclusionExtension ".java"

https://support.microsoft.com/en-us/help/4028485/windows-10-add-an-exclusion-to-windows-security

  Add an exclusion to Windows Security.

https://docs.microsoft.com/en-us/powershell/module/defender/add-mppreference

  Modifies settings for Windows Defender from PowerShell.

https://docs.microsoft.com/en-us/powershell/module/defender/remove-mppreference

  Removes exclusions or default actions.

Exclude directories Windows Search Indexing

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* Open Windows Control Panel.

* Search for "index" and choose "Indexing Options".

* Click the "Modify" button

* Under the appropriate drive letter, navigate to the folder you want to exclude, and make sure it

  is unchecked.

* Double-check your work by verifying the directory shows up in the "Exclude" column of the "Summary

  of selected locations" table.