It's now ben a month since I got rid of Windows Vista. I haven't had a single BSOD since then, but I have had a run of smaller crashes: programs freezing up; Windows Explorer not answering to the switch and refusing to shut down; my screen resolution changing to 640x480 all by itself and not wanting to change back. A couple of days ago I updated my video driver and so far, that seems to have fixed things. I have a fairly ordinary NVidia video card, and assumed that the Win 7 installation would have sorted out any driver problems but apparently not. So. A resounding two cheers for Windows 7! I am almost impressed.