KB5078885: Improved: File History in Control Panel when backing up files.

March 10, 2026—KB5078885 (OS Builds 19045.7058 and 19044.7058)

This security update includes fixes and quality improvements that are part of the following updates:

• February 10, 2026—KB5075912 (OS Builds 19045.6937 and 19044.6937)

The following is a summary of the issues that this update addresses when you install this update. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

• [Windows System Image Manager] This update adds a warning dialog to help users confirm that the selected catalog file comes from a trusted source.
• [File History] Improved: File History in Control Panel when backing up files. New files with names containing some Chinese and Private Use Area characters can now be backed up.
• [Graphics] Improved: A stability issue affecting certain GPU configurations.
• [Secure Boot] With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. This targeting is based primarily on client device diagnostic data; due to limited data, servers are unlikely to qualify, though not explicitly excluded. Devices receive new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout.