Marked as solved. Still no BSODs since driver updates 4 days ago.
Still looking at updating the antivirus, but it does not appear to be causing any issues.
Thanks again axe0!

axe0,

Thanks for letting me know about the IRST Service.

I haven't updated trend micro. Appreciate you highlighting that its not compatible with Windows 10. I will update to a Windows 10...

Hi axe0

1. Have uninstalled and reinstalled AMD drivers using utility and manuf. drivers per instructions
2. Updated sound driver using Lenovo System Update tool but it driverquery does not...

Hi axe0,
Thanks for your help and advice.
I'm working through your recommended actions now. Will let you now how I go.

Hi,

I have had repeated BSOD with message (DPC_WATCHDOG_VIOLATION) on a Lenovo E550 running Win 10 Pro 6 bit (upgraded from win 8.1pro 64). It occurred:
1. on sleeping, and
2. seemingly...