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...