Windows 10 Security Update KB5087544 causing freezing issues

The described behavior matches a known pattern where a specific scheduled or security-related task introduced by a Windows update causes a freeze a few minutes after startup, especially when the device is online.

From a similar Windows 10 case, a system would freeze consistently about 5 minutes after startup only when connected to the internet. The root cause there was a scheduled task named Microsoft\Windows\PI\Secure-Boot-Update that was triggered shortly after boot and caused the freeze. Disabling that task stopped the freezes entirely.

Given that uninstalling the security update stops the freezing and reinstalling it brings the issue back, the most likely cause is a component or scheduled task introduced or modified by that update, rather than a general hardware fault.

Actionable steps:

1. Boot into Windows normally and sign in.
2. Before the 5-minute mark, open Task Scheduler (search for "Task Scheduler" from Start).
3. In the left pane, navigate to Task Scheduler Library → Microsoft → Windows → PI.
4. Locate the task Secure-Boot-Update (or similarly named task related to secure boot or platform integrity).
5. Right‑click the task and choose Disable.
6. Reboot and test whether the system still freezes after 5 minutes with the update installed.

If the freezes stop after disabling the task, the issue is the same class of problem as the referenced case and is tied to the update’s scheduled operation rather than general system corruption.

If the issue persists even after disabling that task, additional troubleshooting would be needed (for example, checking other tasks created/modified by that update, or reviewing system logs around the 5‑minute mark), but the context provided specifically highlights this Secure-Boot-Update task as a known cause of 5‑minute post‑boot freezes.

References:

• Windows 10 freezes every time 5 minutes after startup - Microsoft Q&A