BSOD caused by atc.sys (Active Threat Control) on 1 out of 2 identical clean installations – Driver conflict?
Hi everyone,
I've been dealing with persistent Blue Screen of Death (BSOD) crashes heavily pointing to atc.sys as the culprit. I am managing two setups(Office Desktop), and here is an update on the situation:
PC 1: Completely fine after running the Bitdefender Uninstall Tool and doing a clean reboot.
PC 2: Even after a completely fresh Windows installation and hardware swaps (RAM, SSD, CMOS battery), the moment Bitdefender is installed and active, the system crashes with atc.sys errors.
Since both systems run a fresh OS, this confirms a direct driver-level conflict between Bitdefender’s Active Threat Control filesystem minifilter and a native driver/firmware on this specific hardware configuration.
Has anyone faced an isolated conflict where atc.sys triggers a BSOD on one specific machine but works fine on others? Are there known conflicts with certain chipset/GPU drivers or Windows ELAM policies that I should look into?
Any advice on troubleshooting this deep driver conflict would be highly appreciated. Thanks!