Microsoft confirms a server-side bug broke Store-based app activation, affecting apps like Notepad with 0x803F8001 error.

Microsoft confirmed today that Outlook mobile may crash or freeze when launched on iPad devices due to a coding error.

Windows 11 users report Notepad, Snipping Tool, and other apps failing to open, showing Microsoft Store error 0x803F8001 on affected systems.

Yet another bug in Windows 11 has left users unable to open apps like Notepad and Snipping Tool, as they are greeted with error code 0x803F8001.

Microsoft is aware of an alleged issue that leaves PCs unable to boot and requires manual recovery after Windows 11 January ...

Many Windows 11 users are unable to open apps on their PCs and are running into error code 0x803f8001.

The first big Windows update of 2026 has bugs: Outlook freezes, app errors, and how to fix them ...

Learn standard window sizes by type, how windows are measured and when custom sizing is needed for replacement or renovation projects.

Managed Identity and virtual machine failures triggered knock-on problems throughout cloud platform Microsoft has reported ...

Windows 11 users are reporting a disruptive wave of application failures, with many unable to open essential system and third-party apps ...

This is Part 2 of our two-part technical analysis on the Gopher Strike and Sheet Attack campaigns. For details on the Gopher Strike campaign, go to Part 1.IntroductionIn September 2025, Zscaler ...

Attackers could even have used one vulnerable Lookout user to gain access to other Google Cloud tenants' environments.