Dell Precision Tower 3630 Installation Manual page 5

3 Restart the system and press F2 to enter the BIOS Setup menu.
4 In the BIOS Setup menu, navigate to System Configuration > Dust Filter Maintenance and select from any of the following intervals:
15, 30, 60, 90, 120, 150, or 180 days.
NOTE: Default setting: Disabled.
NOTE: Alerts are generated only during a system reboot and not during normal OS operation.
To clean the dust filter, brush or gently vacuum and then wipe down the external surfaces with a moist cloth.
Dust filter for Precision Tower 3630 5