My friend had this problem when he installed TQ.He has a ATI 9550 I think.Anyways,I fixed it by installing the omega drivers.First,uninstall display drivers from add/remove programs.Get driver cleaner and install
http://downloads.guru3d.com/download.php?det=745 When pc reboots hit F8 and go into safe mode,run driver cleaner for all ATI listed.Restart,install omega drivers
http://www.omegadrivers.net/ati.php with fastwrites disabled.Also,go into your BIOS and set fastwrites off.
That worked for my friend BSODS so,hope that solves it.