Hello Professoramy, Welcome to SF!
Your crashes all have different signatures... hard to tell as yet what caused it exactly. Could be drivers
, Hardware and maybe temperature.
Please check the following:
1. Run in Safe mode w/ networking Safe Mode
2. If that works ok, run SFC: SFC /SCANNOW Command - System File Checker - Windows 7 Forums
3. If that tells you it's ok... it is time to do some testing: RAM - Test with Memtest86+ - Windows 7 Forums
But, before you do all that... please finish all Windows Updates, manually if needed.
Your drivers seem ok except for some doubts I have about the graphical driver
If you have Catalyst Center installed, de-install fully. Go to Global Provider of Innovative Graphics, Processors and Media Solutions | AMD
and install ONLY the driver for your card.
Good luck and please post back your results...