Hello, i have a windows 10 pro 64bit computer with an HD 5770 Ati Radeon, and i got random crashes of the kind of TDR Timeout, some it recover, and some it does not. I have found the log files and have 826 on C:\Windows\LiveKernelReports\WATCHDOG that i can hand over and 9 on C:\Windows\Minidump.
Describe my system:
The HD5xxx series has reached peak optimisation and been moved to legacy status, there will not be any further driver updates for your product. More information available here.
The latest Crimson driver for your system is 16.2.1 and is available here.
The last Catalyst driver for your system is 15.11.1 Beta and is available here.
I would recommend using DDU to sweep your system of AMD drivers, and then trying the drivers above to see if they resolve your issue.