Oh, I didn't know about any 'footprint'. I thought that Windows 10 automatically defragments on a regular basis.

Oh no. The footprint left behind by all windows updates have to be removed manually via the disc clean-up tools in the control panel.
System & Security --> Freeup Disc Space --> Clean-up system files --> then OK to remove via Windows Update Clean-up.
When that has finished you will need to defrag or trim the SATA or SSD. After that your registry cleaner can be deployed to remove any scars left in the registry.

Oh no. The footprint left behind by all windows updates have to be removed manually via the disc clean-up tools in the control panel.
System & Security --> Freeup Disc Space --> Clean-up system files --> then OK to remove via Windows Update Clean-up.
When that has finished you will need to defrag or trim the SATA or SSD. After that your registry cleaner can be deployed to remove any scars left in the registry.

TRIM is an ATA command set that was originally designed for the purpose of keeping a Solid State Drive at its optimal performance throughout its lifespan.

The TRIM feature allows Windows 10, or any supported operating system, to notify an SSD which blocks of data are no longer in use and can be safely wiped out to be writable again. Having this operation done ahead of time improves performance, as the drive won't have to spend time erasing a particular block when space is needed to store new data, ensuring the SSD reaches its advertised lifespan.

While the operating system should properly detect and enable TRIM automatically, sometimes this may not happen. In this Windows 10 guide, we'll show you the commands to make sure TRIM is configured and how to enable it when it's not.

How to check TRIM is enabled in your Windows 10 PC

Making sure that TRIM is enabled on Windows 10, you only need to use a command using the Command Prompt with administrator privileges.

Use the Windows key + X keyboard shortcut to open the Power User menu and select Command Prompt (Admin).
Type the following command and press Enter:

fsutil behavior query DisableDeleteNotify

Explanation: If after executing the fsutil command with the DisableDeleteNotify you get a result of zero (0), then it means that TRIM is enabled, and no further action is required. However, if after running the command you see a result of one (1), then it means that TRIM is disabled.

How to enable TRIM on your Windows 10 PC

When TRIM isn't enabled on Windows 10, you need to do the following:

Use the Windows key + X keyboard shortcut to open the Power User menu and select Command Prompt (Admin).
Type the following command and press Enter:

fsutil behavior set DisableDeleteNotify 0

After running the command, you will notice the same DisableDeleteNotify = 0, which indicates that the feature is enabled.

How to disable TRIM

If at any time for any reason you need to disable TRIM, you need to do the following:

Use the Windows key + X keyboard shortcut to open the Power User menu and select Command Prompt (Admin).
Type the following command and press Enter:

fsutil behavior set DisableDeleteNotify 1

For TRIM to work, both the operating system and the Solid State Drive must support the feature, and it must be enabled in the operating system.

A cumulative update for Windows 10 is making another appearance as Microsoft prepares users' systems for more significant service updates further down the line.

This is far from being the first time Microsoft has pushed the KB4023057 update, and it's not hard to understand why. This update improves the reliability of the Windows Update Service components which will prove so essential when a bigger feature update is released later in the year.

The KB4023057 update is aimed at many different versions of Windows 10, but only the consumer editions; Microsoft stresses that "this update is not intended for use in enterprise environments". The company describes the update, saying:

As this is a mandatory update, it will be automatically downloaded and installed on systems that need it. While there are no known issues with KB4023057, Microsoft points out the following:

• This update may request your device to stay awake longer to enable installation of updates.

Note The installation will respect any user-configured sleep configurations and also your "active hours" when you use your device the most.

• This update may try to reset network settings if problems are detected, and it will clean up registry keys that may be preventing updates from being installed successfully.
• This update may repair disabled or corrupted Windows operating system components that determine the applicability of updates to your version of Windows 10.
• This update may compress files in your user profile directory to help free up enough disk space to install important updates.
• This update may reset the Windows Update database to repair the problems that could prevent updates from installing successfully. Therefore, you may see that your Windows Update history was cleared.

Yes do ,then I’ll look at mine .

When that has finished you will need to defrag or trim the SATA or SSD.

Trim maybe but it just increases the wear rate of an SSD to defrag it. I doubt any modern tools would even attempt it. I'm pretty sure Windows itself won't although it may indicate that it has done "something".

I just checked - it looks like Win 10 automatically retrims SSDs.

I doubt if very many still use defrag, unless they have small drives.

By default, Windows 10 has scheduled optimization turned on automatically. At least once a week, your disk drives, namely the C: drive, are automatically optimized to help your computer run more efficiently or analyzed to determine if optimization is required.

However, even though Windows 10 can accurately detect the type of storage and handle defragmentation of the files automatically, it may not always be as optimal as it lets on. This is usually because the PC isn’t left on long enough for the optimization to take effect which prevents proper maintenance.

So every once in a while it’s best to manually perform analysis and optimization on your hard disk drive to ensure proper maintenance. If you discover any file fragmentation during your analysis, then your Windows 10 computer may be in need of a defrag.