I removed MalwareBytes (according to the list of non-compatible software posted above) I will wait a while to see if stop the bsods. I updated the version (I thought it was automatic or a notice to update) Day 7 I had another bsod (but it was another windows program storport.sys) As I still had Malwarebytes installed I have to wait. I have a habit of just suspending the computer for several days (I don't know if this causes anything, but anyway it is strange that bsods take about 5 ~ 10 days to occur again) Thank you.