Both XPS and OXPS are electronic document formats developed by Microsoft. Currently, there is a pre-installed XPS Viewer in the Windows system to view XPS files. However, it may be a bit difficult to load XPS files in Windows 10/11 now, because Microsoft’s June update broke XPS-related functions.
The problem updates are KB5014666 and KB5014668, which are optional cumulative updates released by Microsoft to Windows 10/11 at the end of June. Then the update content was merged in the B-type cumulative update released in July, so users who have installed the update after the end of June will be affected by this problem. Moreover, KB5014666 also caused input method problems, and KB5014668 caused Windows 11 users to be unable to open the start menu normally after installation.
After installing the relevant updates, non-English XPS and OXPS files cannot be opened, including files containing Chinese character encoding and Japanese character encoding. This issue affects both XML Paper Specification (XPS) and Open XML Paper Specification (OXPS), and the page cannot be displayed when users try to load it.
At the same time, there may be freezes and automatic crashes, and after the crash, the CPU and RAM resources occupied by the XPS previewer continue to increase until 2.5GB. At present, Microsoft has not provided a temporary solution and is investigating the cause of this problem. The affected versions are mainly Windows 10 Build 19044.1806/Windows 11 Build 22000.778 and subsequent new versions.