This device cannot start. (Code 10)

Why do I continually get this message about the Arduino driver ? (Uno) I'm pulling my hair out here...........

This device cannot start. (Code 10)

^_^

What PC do you have? Which OS, servicepack? How many COM ports are defined? Which version of IDE? Have you tried the UNO on another PC to see if the same message pops up?

,Thanks for reply, last question first, it works OK on another computer, I just tried it. Hooray !

The laptop I want to use it on that doesn't work is; HP Presario CQ57 Notebook PC, Windows 7 Home Premium, 64 bit , Service pack 1

How do I define the COM ports and find out the IDE version ?

Thanks again, Eric Thacker

COmports can be found in the devicemanager of windows (computer-> right mouse -> manage ...)