Hi,
I had the same problem with Windows 7 Home Premuim (64bit), and changed to Windows 7 Prof (32bit) and since then everything is running smoothly.
Greetings
christoffe
So it was some 64 bit driver? Mind to explain better?
I'm not going back to 32bit with 4gb of ram and some software that uses 64bit calculations. I think that Peter finds 32 bit floating point sufficient for all tasks so far