I run Windows 10 64bit (1903) on Precision T3600 for a long time and since 13/08/2019 I am facing the problem of very often happening BSOD (each 20-30 minutes). They have different causes like: Critical process died, unexpected store exeption or DPC Watchdog violation, but last times mainly it is irql_not_less_or_equal at iaStorA.sys.
I use SSD with Win10 + HDD with data. AHCI controller enabled.
I tried a lot of things:
Checking hardware, testing it with different programs
Updating all drivers I found (Windows device manager, Dell SupportAssist, Intel driver assistant)
Uninstalling some windows updates
Updating Intel RST driver (but my chipset is not supported - C600)
AV scanning of entire system (also boot sectors and RAM)
Changing from AHCI to ATA contoller (can't find the SSD later)
iaStorA.sys version is 22.214.171.1242 dated 23/06/2013. I can't find any update for it.
The dump file is not being generated, event viewer shows always 41 Kernel-Power with no further information.
Could you please try helping me with some further ideas?