Windows Needs to Format this device when you plug in usb stick

I recently bought myself a Sandisk Cruzer stick for on the road.
Everything worked fine untill windows (vista) began to complain when I plugged in the stick : Windows needs to format this device (or something very similar)

Having some data on the stick I didn't want to format it, so I started looking around. I found the solution :

With the usb stick plugged in (it does not really matter but it makes it easier)
go to Start / Control Panel
Here depending on whether you have the classic view or not :
Classic view : System / Device manager (left side)
Standard view : Hardware and Sound / Device manager / View hardware and devices

Here find the usb stick driver in the device manager (should be under Disk Drives),
be sure to select the correct one!
Right click it and choose uninstall

After this unplug and replug the usb stick, vista will now install 'new' drivers and that did the trick for me.

I also read somebody who had to redo this when he restarted vista, but in my case this was not needed.