Warning
Use an administrator account for these steps, and keep a recent backup before making repair or security changes.
What you will achieve
Stop apps you do not need from running in the background and slowing the PC.
1) Limit background permissions
- Open Settings → Apps → Installed apps.
- For each app, open Advanced options and set Background app permissions to Never where sensible.
2) Stop startup bloat
Disable non-essential entries under Task Manager → Startup apps.
3) Verify memory pressure
Use Task Manager → Performance → Memory after reboot and confirm lower idle usage.