Dive past Task Manager to see per-process disk writes, open handles, and the remote IPs a service is contacting.
If Task Manager is showing wrong uptime in Windows 11, disable Fast Startup, verify uptime via WMIC, restart WMI service, ...
If the Startup Impact column in Task Manager is showing Not measured, this post will help you. This usually means Windows is not tracking startup apps at boot time. The good news is that it is usually ...