Fix: driver_irql_not_less_or_equal (tbimdsa.sys) – Varonis

You may receive a blue screen of death (BSOD) attempting to start your Windows machine. The error is as follows.

DRIVER_IRQL_NOT_LESS_OR_EQUAL

STOP: 0x000000D1 tbimdsa.sys

The reason for the error is due to the Varonis Deep Security Agent that is installed. As documented by TrendMicro, follow the steps below to correct the issue.

1. Check if the Deep Security Agent driver (TBIMDSA.SYS) has been updated to the latest version.

2. Verify the file under C:\Windows\System32\Drivers\TBIMDSA.SYS. The file should be using the latest version, or the version that comes with the installation. Otherwise, reboot the machine and check if the file has been updated.

3. You may also remove the Trend Micro DSA Filter Driver under Network Properties and then reboot the machine. After rebooting, the driver will be installed back to the machine using the latest version that comes with the installation.