Applies to: managed staff laptops. This has not been seen on managed staff desktops.
Laptop crashes with a blue screen showing an error message "DRIVER IRQ NOT LESS THAN OR EQUAL" in relation to file NETIO.SYS.
Restart the laptop. If you use the Firefox browser then update it to the latest version (Menu > Help > About Firefox should show at least version 105.0.1).
Desktop PCs are not believed to be affected so moving to a desktop temporarily could help in persistent cases.
Root cause and fix
This is believed to be caused by a bad interaction between Firefox and Sophos antivirus. Updates for both packages have been deployed to managed staff PCs that were affected.
Closed. (Updated 09/12/2022)